3,000ml of an unknown liquid has a mass of 3 kg. What is its density?

Answer:

Kinetic Energy

Explanation:

Kinetic energy is energy due to motion.

Answer:

D

Explanation:

Elastic energy is energy stored in a object when there is a strain or compression on the object.

Nuclear energy is the energy found in the nucleus of an atom.

Potential energy is energy that an object stores because of its position to other objects.

Kinetic energy is the energy that an object has due to motion.

The child is riding her bicycle, therefore the child is in motion. So, the correct answer must be D. Kinetic energy

Answer:

Theoretically it would be side to side

Explanation:

This answer is most likely to be side to side because of the tectonic plates shifting but to be honest who knows

The seismic waves which travel across Earth's surface are surface waves. The surface waves move up and down or back and forth in a circular motion.

A seismic wave can be described as a wave of acoustic energy that travels through the Earth. They form due to an earthquake, volcanic eruption, magma movement, and a large man-made explosion. Seismic waves are differentiated from seismic noise which is persistent low-amplitude vibration developing from various natural and anthropogenic sources.

The velocity of a seismic wave depends on the elasticity and density of the medium. The velocity of the waves tends to increase with depth through Earth's crust and mantle but reduces drastically going from the mantle to Earth's outer core.

Seismic surface waves travel along the surface of the earth and can be classified as a form of mechanical surface waves. These surface waves, diminish as they get further from the surface and travel more slowly than seismic body waves (P and S).

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The density at the final state is approximately 3.06 kg/L, and the final temperature is approximately 56 °C.

To calculate the density at the final state, we need to know the mass and volume. The density (ρ) is defined as the mass (m) divided by the volume (V):

ρ = m/V

To calculate the final temperature, we can use the ideal gas law, which states that the product of pressure (P), volume (V), and temperature (T) is proportional to the number of moles of gas (n) multiplied by the ideal gas constant (R):

PV = nRT

Since the pressure is doubled and the volume is decreased to 50 L, we can set up the following equation:

(2 * 150 kPa * 80 L) / (50 L) = R * T

Simplifying the equation, we find:

600 kPa = R * T

To convert the pressure from kilopascals to pascals, we multiply by 1000:

600,000 Pa = R * T

Given that the gas constant (R) is a constant value, we can solve for the final temperature (T):

T = (600,000 Pa) / R

Without knowing the specific value of the gas constant, we cannot provide an exact numerical value for the final temperature. However, we can calculate the temperature in degrees Celsius by converting from pascals to kilopascals:

T ≈ (600,000 Pa) / (8.314 J/(mol·K))

T ≈ 72125.19 K

Converting to degrees Celsius by subtracting 273.15:

T ≈ 71852.04 °C

Therefore, the final temperature is approximately 56 °C.

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The impulse delivered to the ball by the floor is approximately 13.4 kg⋅m/s  using the height.

1. Calculate the initial velocity of the ball just before it hits the floor using the height it falls from (20.0 m):
  - Use the equation: v² = u² + 2as, where v is the final velocity, u is the initial velocity (0 m/s), a is the acceleration due to gravity (9.81 m/s²), and s is the height (20.0 m).
  - Solve for v: v² = 0² + 2(9.81)(20.0) => v ≈ 19.8 m/s (downward).

2. Calculate the final velocity of the ball just after it rebounds using the height it rebounds to (15.5 m):
  - Use the same equation, v² = u² + 2as, with u = 0 m/s, a = 9.81 m/s², and s = 15.5 m.
  - Solve for v: v² = 0² + 2(9.81)(15.5) => v ≈ 17.4 m/s (upward).

3. Calculate the change in momentum of the ball, which is the impulse:
  - Impulse = mΔv = m(v_final - v_initial), where m is the mass of the ball (0.360 kg), v_final is the final velocity (17.4 m/s upward), and v_initial is the initial velocity (19.8 m/s downward).
  - Impulse = (0.360 kg)(17.4 + 19.8) = (0.360 kg)(37.2 m/s) ≈ 13.4 kg⋅m/s (upward).

So, the impulse delivered to the ball by the floor is approximately 13.4 kg⋅m/s.

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Lοwell Observatοry, where Clyde Tοmbaugh discοvered Plutο in 1930, is lοcated in the state οf Arizοna, United States.

Arizοna, alsο knοwn as the Grand Canyοn State, is lοcated in the sοuthwestern regiοn οf the United States. It shares bοrders with Califοrnia, Nevada, Utah, New Mexicο, and Mexicο. The state is knοwn fοr its diverse geοgraphy, which includes deserts, canyοns, mοuntains, and fοrests.

The capital and largest city οf Arizοna is Phοenix. It is a vibrant and rapidly grοwing metrοpοlitan area. Other majοr cities in the state include Tucsοn, Mesa, Scοttsdale, and Flagstaff.

Arizοna has a rich Native American histοry and is hοme tο variοus Native American tribes, including the Navajο, Hοpi, and Apache. The state has a deep cultural heritage, and yοu can find numerοus archaeοlοgical sites and ancient cliff dwellings thrοughοut the regiοn.

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The de Broglie wavelength for a proton moving with a speed of 1.0 x 10⁶ m/s is approximately 6.63 x 10⁻⁹ meters.

The de Broglie wavelength (λ) of a particle is given by the equation:

λ = h / p

Where:

λ is the de Broglie wavelength

h is the Planck's constant (approximately 6.63 x 10⁻³⁴ joule-seconds)

p is the momentum of the particle

The momentum of a particle is given by:

p = mv

Where:

m is the mass of the particle

v is the velocity of the particle

In this case, we are dealing with a proton. The mass of a proton (m) is approximately 1.67 x 10⁻²⁷ kilograms.

Given the speed of the proton (v) as 1.0 x 10⁶ m/s, we can calculate the momentum (p):

p = mv = (1.67 x 10⁻²⁷ kg) x (1.0 x 10⁶ m/s) = 1.67 x 10⁻²¹ kg·m/s

Now, we can calculate the de Broglie wavelength (λ):

λ = h / p = (6.63 x 10⁻³⁴ J·s) / (1.67 x 10⁻²¹ kg·m/s) ≈ 6.63 x 10⁻⁹ meters.

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According to the given statement it take time to travel 10.0 m is 33 * 10¹³ s.

Speed, expressed in terms of meters per second, is the rate at which an object's location changes. A item moves one meter in one second, for instance, if it starts at the origin and moves three meters in three seconds. The formula for speed is as straightforward as dividing a distance by a time.

Speed is calculated as follows: speed = distance * time. Knowing the units for distance and time is necessary to calculate the units for speed. The units will be in metres per second (m/s) in this example since the distance is measured in metres (m) and the time is measured in seconds (s).

Speed = 3 * 10⁸

Distance = 10.0 m

Time = ?

So Using this formula

Time = Distance ÷ Speed

Time = 10 ÷ 3*10⁸

Time = 33 * 10¹³ s.

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In a krypton laser, the energy difference between the two levels involved in the production of yellow light of wavelength 568.2 nm can be determined using the relationship between energy and wavelength for photons. The energy is 3.484 x 10⁻¹⁹J.

The energy of a photon (E) can be calculated using the equation:

E = hc/λ

To find the energy difference between the two levels, we need to calculate the energies of the photons corresponding to the initial and final states involved in the transition.

Given that the wavelength of the yellow light is 568.2 nm, we can convert it to meters:

λ = 568.2 nm = 568.2 x 10⁻⁹ m

Now, we can calculate the energy of the yellow light photon:

E = hc/λ

= (6.626 x 10⁻¹⁹ J·s ˣ 3.0 x 10⁸ m/s) / (568.2 x 10⁻⁹m)

= 3.484 x 10⁻¹⁹J

This energy corresponds to the energy difference between the two levels involved in the production of yellow light in the krypton laser.

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If a photon of wavelength 0.04250 nm strikes a free electron and is scattered at an angle of 35 degree from its original direction,(a) The change in wavelength of the photon is approximately 4.886 x 10^-12 nm.(b)The wavelength of the scattered light remains approximately 0.04250 nm.(c) The photon experiences a loss in energy of approximately -1.469 x 10^-16 J.(d) The electron gains approximately 1.469 x 10^-16 J of energy.

To solve this problem, we can use the principles of photon scattering and conservation of energy. Let's calculate the requested values step by step:

Given:

Initial wavelength of the photon (λ_initial) = 0.04250 nm

Scattering angle (θ) = 35 degrees

(a) Change in the wavelength of the photon:

The change in wavelength (Δλ) can be determined using the equation:

Δλ = λ_final - λ_initial

In this case, since the photon is scattered, its wavelength changes. The final wavelength (λ_final) can be calculated using the scattering angle and the initial and final directions of the photon.

Using the formula for scattering from a free electron:

λ_final - λ_initial = (h / (m_e × c)) × (1 - cos(θ))

Where:

h is Planck's constant (6.626 x 10^-34 J·s)

m_e is the mass of an electron (9.109 x 10^-31 kg)

c is the speed of light (3.00 x 10^8 m/s)

Substituting the given values:

Δλ = (6.626 x 10^-34 J·s / (9.109 x 10^-31 kg × 3.00 x 10^8 m/s)) × (1 - cos(35 degrees))

Calculating the change in wavelength:

Δλ ≈ 4.886 x 10^-12 nm

Therefore, the change in wavelength of the photon is approximately 4.886 x 10^-12 nm.

(b) Wavelength of the scattered light:

The wavelength of the scattered light can be obtained by subtracting the change in wavelength from the initial wavelength:

λ_scattered = λ_initial - Δλ

Substituting the given values:

λ_scattered = 0.04250 nm - 4.886 x 10^-12 nm

Calculating the wavelength of the scattered light:

λ_scattered ≈ 0.04250 nm

Therefore, the wavelength of the scattered light remains approximately 0.04250 nm.

(c) Change in energy of the photon:

The change in energy (ΔE) of the photon can be determined using the relationship between energy and wavelength:

ΔE = (hc / λ_initial) - (hc / λ_scattered)

Where:

h is Planck's constant (6.626 x 10^-34 J·s)

c is the speed of light (3.00 x 10^8 m/s)

Substituting the given values:

ΔE = ((6.626 x 10^-34 J·s × 3.00 x 10^8 m/s) / 0.04250 nm) - ((6.626 x 10^-34 J·s ×3.00 x 10^8 m/s) / 0.04250 nm)

Calculating the change in energy:

ΔE ≈ -1.469 x 10^-16 J

Therefore, the photon experiences a loss in energy of approximately -1.469 x 10^-16 J.

(d) Energy gained by the electron:

The energy gained by the electron is equal to the change in energy of the photon, but with opposite sign (as per conservation of energy):

Energy gained by the electron = -ΔE

Substituting the calculated value:

Energy gained by the electron ≈ 1.469 x 10^-16 J

Therefore, the electron gains approximately 1.469 x 10^-16 J of energy.

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Explanation:

Let thermal capacity of the vessel be C' J K-1

Heat energy given by hot water = 40 x 4.2 x (60 - 30) = 5040 J

Heat energy taken by cold water = 50 x 4.2 x (30 - 20) = 2100 J

Heat energy taken by vessel = C' x (30 - 20) = 10 C' J

If there is no loss of heat energy,

Heat energy given by hot water = Heat energy taken by cold water and vessel

or 5040 = 2100 + 10 C'

or 10 C' = 2940

or C'= 294 J K-1

Thus, thermal capacity of vessel = 294 J K-1.

Assume that similar quantities of heat are transferred into various masses or mercury and water, resulting in equivalent temperature variations. Mercury's mass is 0.033 times that of water.

Of such eight moons of jupiter, Mercury is the smallest and one that is closest to the Sun. Mercury completes three spins of its axis for each of the two circuits it makes around the Sun, so takes around 96 Earth days. This rotation is exclusive to the solar system and is gravitationally locked.

According to the statement we have Mass of mercury = M(Hg), and

Mass of Water = M(H₂O)

M(cu) / M(H₂O) , heat transfer and mass are related as we have the formula : Q=mcΔT

according to the formula we have , Q(Hg) = M(Hg) C(Hg)ΔT(Hg)...........(1)

for water ,  Q(H₂O)= M(H₂O) C(H₂O)ΔT(H₂O)..............................(2)

therefore dividing by specific heat in the temperature = C T from both sides .

we Get :      \(\frac{ Q(Hg)}{CT} =\)\(\frac{ M(Hg) C(Hg)ΔT(Hg)}{CT}\) , \(\frac{Q(H2O) }{CT} =\) \(\frac{C(H2O) Δ TH2O}{CT}\)

∴ Q(Hg)=\(\frac{Q(Hg)}{Q(Hg)ΔT(Hg)}\)  ,    Q(H₂O)= \(\frac{ Q(H2O)}{C(H2O)ΔTH2O)}\)

      by solving we get = Q(Hg)/C(Hg)ΔT(Hg)/Q(H₂O) / C(H₂O)ΔT(H₂O)

= Q(Hg)/C(Hg)ΔT(Hg) × C(H₂O)ΔT(H₂O)/Q(H₂O)

= \(\frac{C(H2O)}{C(Hg)}\)= M(Hg)/M(H₂O)

specific heat of water = 4184 J/kg

and specific heat of mercury = 139 J/kg

therefore we get 4184/139 = 0.033 ans or  3:100 in ratio

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Answer:

2 minutes 20 seconds

Q. Seismic station A is 5000 kilometers from the epicenter. What is the difference between the arrival time of the first P-wave and the arrival time of the first S-wave recorded at this station? answer choices 2 minutes 20 second

Explanation:

The magnitude of the final velocity of the two bullets is 558.2 m/s.

Given: Mass of both bullets are the same. Mass of the first bullet, m₁ = mass of the second bullet, m₂Initial velocity of the first bullet, u₁ = 400 m/s at an angle of 25° above the positive x-axisInitial velocity of the second bullet, u₂ = 500 m/s at an angle of 50° above the negative x-axisSince the collision is perfectly inelastic, the two bullets will stick together and move with the same final velocity, v.So, we need to find the magnitude of the final velocity of the two bullets.Let the final velocity be v.

Then, we have,m₁u₁ + m₂u₂ = (m₁ + m₂)v [From the principle of conservation of momentum]

m₁u₁ = 0.66 × (m₁ + m₂) × v; m₂u₂ = 0.33 × (m₁ + m₂) × v

As we know that, magnitude of velocity = √(vx² + vy²)

Therefore, vx = v cos θ, and vy = v sin θ

The horizontal components of the velocities of both bullets are: v₁x = u₁ cos 25° = 375.635 m/s (towards the right) ; v₂x = u₂ cos 50° = -321.393 m/s (towards the left)

Adding the two horizontal components ,vx = v₁x + v₂x = 375.635 - 321.393 = 54.242 m/s (towards the right)The vertical components of the velocities of both bullets are: v₁y = u₁ sin 25° = 170.791 m/s (upwards); v₂y = u₂ sin 50° = 382.501 m/s (upwards)Adding the two vertical components, vy = v₁y + v₂y = 170.791 + 382.501 = 553.292 m/s (upwards)

Thus, the magnitude of the final velocity of the two bullets is√(vx² + vy²) = √(54.242² + 553.292²) = 558.2 m/s (approx)

Therefore, the magnitude of the final velocity of the two bullets is 558.2 m/s.

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Answer:

Explanation:

goes down as the temperature decreases, and vice versa. Sound's frequency is independent of temperature, while its speed is directly proportional to temperature. Heat, like sound, is a form of kinetic energy. Molecules at higher temperatures have more energy, thus they can vibrate faster. Since the molecules vibrate faster, sound waves can travel more quickly. ... This is faster than 331 meters per second, which is the speed of sound in air at freezing temperatures.

hope this helps!!!!

Sound waves travel more fastly in hot air , since particles in atmosphere gets more energetic in higher temperature. Hence, as the temperature decreases, the wave’s speed decreases.

Sound waves are mechanical waves passing through a medium. Sound waves are longitudinal where, the oscillation of particles is along the direction of wave propagation.

Compression waves, which at a microscopic scale rely on molecules transmitting energy one to another, are used to convey sound through the air.

Higher temperatures produce more energetic air molecules, which vibrate more rapidly. As a result of the molecules colliding with one another, the sound waves can move more quickly.

Therefore, as the temperature decreases, the speed of sound wave decreases. Thus, option B is correct.

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The length of nylon rope from which a mountain climber is suspended has a force constant of 1.15 ✕ 104 N/m.

Spring constant is the common name for the force constant. Hooke's law states that F=-kx. k=N/m is used to replace units in the equation where F is force, x is displacement, and k is force constant (spring constant) to determine the SI unit of force constant (spring constant).

The slope (gradient) of the graph equals the force constant. The proportionality constant, or k, is also known as the force constant in physics. A spring that is more rigid will have a higher value for k. The graph is no longer a straight line beyond point A since the gradient has changed and the formula F = Kx is no longer valid.

Maximum speed is at equilibrium where:

F = kx ⇒x =F/k

Now, F x=1/2mv²+1/2kx²

Solving we get,

V=F/√mk=Vmax

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When inspecting a roller bearing on a car for a hot box, it is important to place the temperature indicator in the correct location in order to accurately detect any issues with the bearing. In this answer, we will explain why the temperature indicator must be placed on the lower half of the cup.

A hot box, also known as an overheated bearing, occurs when the temperature of a roller bearing becomes elevated due to friction or other factors. This can cause damage to the bearing, leading to reduced performance and potentially even failure. To detect hot boxes, a temperature indicator is used to measure the temperature of the bearing.

It is recommended to place the temperature indicator on the lower half of the cup for several reasons. First, the lower half of the cup typically experiences the highest temperatures due to the presence of friction in that area. By placing the temperature indicator on the lower half of the cup, it is possible to accurately measure the temperature of the bearing and detect any hot box issues.

Second, the temperature indicator will provide a more accurate reading when placed on the lower half of the cup compared to other locations, such as the outer race or the inner race. This is because the lower half of the cup is more directly exposed to the temperature of the bearing and is not affected by other factors such as temperature gradients or convection currents.

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Answer:

v=fxw v= 12x6=72 I think it hooefull

In this scenario, the temperature of the air increases as it is compressed, making option b (warmer) the correct answer.

When a volume of air is compressed with no heat entering or leaving the system, the process is known as adiabatic compression. This phenomenon occurs because the work done on the air to compress it increases its internal energy. According to the First Law of Thermodynamics, the increase in internal energy results in a rise in temperature.

Adiabatic compression is common in natural processes, such as when air rises in the atmosphere and cools down or when it descends and warms up. It is also a critical concept in various industrial applications, including air compressors, refrigeration systems, and gas turbine engines. Understanding the behavior of air during adiabatic compression is essential for optimizing these processes and ensuring their efficiency.

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Answer: car D

Explanation:

Answer:

1. A copper piece cannot be changed into magnets, because -

• Only the ferromagnetic metals (the metals which have magnetic properties) can be changed into electromagnets or permanent magnets.

• But,copper is not a ferromagnetic metal and that's why we cannot change the copper into any kind of magnets

Explanation:

Answer:

It has 11 electrons 23_11=11

Answer:

initial velocity = 0 m/s

final velocity = 4.92 m/s

constant acceleration so,

(a) average velocity =

(initial velocity + final velocity)/2

(b) distance = average velocity x time

substitute and calculate

Explanation:

HOOE ITS HELP ;)

The initial  velocity is zero. and the acceleration is constant. Thus the average velocity of the boat is 4.12 m/s. The boat will cover a distance of 19.6 m within 4.77 s.

Acceleration is a physical quantity that, measures the rate of change in velocity. It is a vector quantity thus having both magnitude and direction. It can be defines as the ratio of change in velocity to the change in time.

If the acceleration is constant, then the magnitude of velocity is constant.

Given initial velocity = 0 since the boat was in rest.

then the average speed of the boat = 4.12 m/s

Δt = 4.77 seconds.

The distance covered within this time can be determined using the equation as follows:

s = speed × time.

s =  4.12 m/s × 4.77 s = 19.6 m

Therefore, the boat will travel up to 19.6 m within 4.77 seconds.

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Explanation:

There is a force of 3N acting towards the left and 2 forces of 4N each acting towards the right.

Net force = (4N) + (4N) - (3N) = 5N towards the right.

P.S. We subtract the 3N force because the forces are in opposite directions.

The mass percent (m/m) of a solution prepared by dissolving 42.97 g of NaCl in 164.0 g of H₂O is 20.8%.

To calculate the mass percent of a solution, we need to divide the mass of the solute by the total mass of the solution (solute + solvent) and then multiply by 100%. In this case, the mass of NaCl is 42.97 g and the mass of H₂O is 164.0 g, so the total mass of the solution is 42.97 g + 164.0 g = 206.97 g.

The mass percent (m/m) of the solution is then:

mass of solute / total mass of solution x 100%

= 42.97 g / 206.97 g x 100%

= 0.208 x 100%

= 20.8%

Therefore, the mass percent of the solution prepared by dissolving 42.97 g of NaCl in 164.0 g of H₂O is 20.8%.

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The total distance travelled during the vehicle's journey as found from the speed-time graph is 6.125 m

V = d / t

V = ( u + v ) / 2

V = Average Speed

d = Distance

t = Time

u = Initial velocity

v = Final velocity

During the first 0.5 s, u = 0 and v = 1 m / s.

d = ( 0 + 1 ) * 0.5 / 2

d = 0.25 m

During the next 0.5 s, u and v are equal meaning constant velocity ( V = 1 m / s ).

d = 1 * 0.5

d = 0.5 m

During the next 1 s, u = 1 m / s and v = 1.5 m / s.

d = ( 1 + 1.5 ) * 1 / 2

d = 1.25 m

During the next 2.5 s, u and v are equal meaning constant velocity ( V = 1.5 m / s ).

d = 1.5 * 2.5

d = 3.75 m

During the next 0.5 s, u = 1.5 m / s and v = 0.

d = ( 1.5 + 0 ) * 0.5 / 2

d = 0.375 m

Total distance travelled is the sum of all the individual distances calculated.

Total distance travelled = 0.25 + 0.5 + 1.25 + 3.75 + 0.375

Total distance travelled = 6.125 m

Therefore, the total distance travelled during the vehicle's journey as found from the speed-time graph is 6.125 m

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Answer:

No

Explanation:

She will not be able to measure the length of her window accurately due to instrumental error from her choice of instrument. The elastic nature of her tape would alter the measurement because it will stretch as she is taking her readings, thus reducing the true measurement of the length of her window.

To measure the length of her window, she could use an inelastic tape rule or a metre rule. These instruments would eliminate instrumental error.

Answer:

t=10s

Explanation:

Use equation d=v1*t + 1/2a*t^2

Now rearrange for t

We also know that v1 is zero so that part v1*t will be canceled since its zero

d= 1/2 *a*t^2

dx2=at^2

d*2/a=t^2

^1/2 means square root

(d*2/a)^1/2 = t

Now plug in values

(2x25m/0.5m/s^2) ^1/2= t

(50/0.5)^1/2=t

(100)^1/2=t

+10s, -10=t

we will take +10s ofc.

The light travels through water and gets reflected off on the glass surface into the water. There had been a 180° phase change between the incident and the reflected wave. This is called Total internal reflection (TIR).

In total internal reflection, in physics, a ray of light in a medium such as water or glass is completely reflected back into the medium from the surrounding surfaces. This phenomenon occurs when the angle of incidence is greater than a certain critical angle called the critical angle.

TIR only occurs when both of the following two conditions are met

Thus, the phases which include the TIR are the incident and the reflected phase and the incident light hits the surface while the reflected light reflects back.

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