Question 1

Light that has been traveling in a medium with an index of refraction n2 is incident on the boundary surface of another medium with an index of refraction n1. Given a sufficient angle of incidence, which of the following conditions must be satisfied for total internal reflection to occur?

Accepted Answer

A)   n1 2 
B)   n1 > n2 
C)   n1 = n2 
D)   Any of these may be correct.
E)   None of these is correct.F) C) and E)
G) A) and B)

Question 2

Mission Control sends a brief wake-up call to astronauts in a distant spaceship. Five seconds after the call is sent, Mission Control hears the waking groans of the astronauts. How far away (at most)  from Earth is the spaceship?

Accepted Answer

A)   7.5 * 108 m
B)   15 *108 m
C)   30 * 108 m
D)   45 * 108 m
E)   The spaceship is on the moon.F) D) and E)
G) C) and D)

Question 3

Two polarizers have their transmission axes at an angle  θ	hetaθ . Unpolarized light of intensity I is incident on the first polarizer. What is the intensity of the light transmitted by the second polarizer?

Accepted Answer

A)   I cos2  θ	hetaθ 
B)   0.5I cos2  θ	hetaθ 
C)   0.25I cos2 θ	hetaθ 
D)   I cos θ	hetaθ 
E)   0.25I cos θ	hetaθF) A) and B)
G) A) and C)

Question 4

Communications satellites are usually placed in geosynchronous orbits, a distance of 4.43 * 107 m from the center of Earth. What is the time lag for a signal sent from one point on Earth's surface to another via such a satellite? (The radius of Earth RE = 6.370 *106 m.)

Accepted Answer

A)   0.13 s
B)   0.25 s
C)   0.51 s
D)   0.29 s
E)   0.15 sF) A) and B)
G) A) and E)

Question 5

Light is incident at an angle of 60 °\degree°  at an air to glass interface. If the angle of refraction inside the glass is 32 °\degree° , then calculate the speed of light within the glass.

Accepted Answer

A)   3.00 * 108 m/s
B)   1.77 * 108 m/s
C)   4.90 * 108 m/s
D)   1.84 * 108 m/s
E)   1.62 * 108 m/s F) None of the above
G) D) and E)

Question 6

The wavelength of green light in air is 500 nm. The wavelength of this light in glass of index of refraction 1.60 is approximately

Accepted Answer

A)   313 nm
B)   500 nm
C)   750 nm
D)   800 nm
E)   427 nmF) C) and D)
G) A) and C)

Question 7

A ray of light traveling in air enters the end of a rectangular block of a material that has an idex of refraction n = 1.35. The largest value of the angle  θ	hetaθ  for which total internal reflection occurs at the upper surface of the material is approximately

Accepted Answer

A)   75º
B)   48º
C)   56º
D)   78º
E)   None of these is correct. F) B) and C)
G) C) and D)

Question 8

A ray of monochromatic light in air falls on the upper surface of two parallel-sided slabs of transparent material, as shown in the diagram. The angle of refraction  ϕ\phiϕ   in the lower slab is approximately

Accepted Answer

A)   22º
B)   30º
C)   37º
D)   53º
E)   60º F) B) and D)
G) A) and C)

Question 9

Sound waves differ from light waves in many respects. One important difference is that sound waves cannot

Accepted Answer

A)   be refracted.
B)   be reflected.
C)   show interference.
D)   show diffraction.
E)   be polarized.F) B) and D)
G) A) and C)

Question 10

A plane wavefront of light (AA')  approaches an air-water interface as shown. n < n'. The refracted wave is best represented by

Accepted Answer

A)   1
B)   2
C)   3
D)   4
E)   None of these is correct. There is no refraction because  θ	hetaθ  is less than the angle of total internal reflection. F) D) and E)
G) C) and D)

Question 11

1  that will cause the unpolarized light to be reflected as completely plane-polarized light is called A)  Brewster's angle. B)  Young's angle. C)  Snells's angle. D)  Huygens' angle. E)  Fraunhofer's angle. " class="answers-bank-image d-inline" rel="preload" > The angle of incidence  θ	hetaθ 1  that will cause the unpolarized light to be reflected as completely plane-polarized light is called

Accepted Answer

A)   Brewster's angle.
B)   Young's angle.
C)   Snells's angle.
D)   Huygens' angle.
E)   Fraunhofer's angle. F) A) and E)
G) B) and D)

Question 12

If the incident beam in the figure is unpolarized and the reflected beam is completely plane polarized, the index of refraction of the glass must be

Accepted Answer

A)   1.16
B)   1.33
C)   1.56
D)   1.73
E)   2.00F) C) and E)
G) All of the above

Question 13

Use the following figure below for the next three problems 1 = 1.45 with a material of refractive index n2 = 1.38. The numerical aperture of a fiber optic is defined as NA = nair sin  	heta m, where  	heta m is the maximum incident angle so that the light ray is totally internally reflected inside the fiber. The NA for the fiber is A)  0.445 B)  0.614 C)  0.645 D)  0.407 E)  0.470 " class="answers-bank-image d-inline" rel="preload" > The figure shows a cross-section of a fiber optic.
-A fiber optic is made by cladding a thin fiber core of refractive index n1 = 1.45 with a material of refractive index n2 = 1.38. The numerical aperture of a fiber optic is defined as NA = nair sin  θ	hetaθ m, where  θ	hetaθ m is the maximum incident angle so that the light ray is totally internally reflected inside the fiber. The NA for the fiber is

Accepted Answer

A)   0.445
B)   0.614
C)   0.645
D)   0.407
E)   0.470 F) C) and D)
G) B) and C)

Question 14

A 6 °\degree°  prism has a refractive index of 1.52. Calculate the angle of incidence for the initial light ray that is then refracted inside the prism and just undergoes total internal reflection at the opposite face of the prism.

Accepted Answer

A)   41.1 °\degree° 
B)   18.9 °\degree° 
C)   29.4 °\degree° 
D)   30.6 °\degree° 
E)   60.6 °\degree°F) C) and E)
G) A) and D)

Question 15

The optical phenomenon that is usually cited as demonstrating the transverse wave nature of light is

Accepted Answer

A)   dispersion
B)   interference
C)   reflection
D)   polarization
E)   refractionF) A) and B)
G) A) and E)

Question 16

An "X" is marked on the bottom of a glass container. A microscope is adjusted so that it is focused on the "X." A liquid is now poured into the glass to a depth of 6.00 cm. If the microscope has to be backed up by a distance of 1.50 cm to refocus on the "X," then calculate the refractive index of the liquid.

Accepted Answer

A)   1.25
B)   4.00
C)   1.33
D)   0.75
E)   3.00F) A) and E)
G) B) and C)

Question 17

"To find the value of the resultant displacement for overlapping waves at any point at a particular instant, it is only necessary to add the values of the displacements for the individual waves." This is a statement of

Accepted Answer

A)   Huygens' principle.
B)   the principle of superposition.
C)   Bernoulli's principle.
D)   the principle of dispersion.
E)   Newton's theory of light.F) A) and E)
G) B) and C)

Question 18

From directly above, you're watching a fish swim 1.83 m beneath the surface of a clear lake (n = 1.33) . How far beneath the surface does the fish seem to be?

Accepted Answer

A)   0.914 m
B)   1.37 m
C)   1.83 m
D)   2.44 m
E)   2.93 mF) C) and E)
G) A) and B)

Question 19

Use the following figure below for the next three problems 1 = 1.45 with a material of refractive index n2 = 1.38. What is the maximum incident angle,  	heta , so that the light ray is totally internally reflected inside the fiber? A)  24.1º B)  26.4º C)  28.2º D)  30.3º E)  32.7º " class="answers-bank-image d-inline" rel="preload" > The figure shows a cross-section of a fiber optic.
-A fiber optic is made by cladding a thin fiber core of refractive index n1 = 1.45 with a material of refractive index n2 = 1.38. What is the maximum incident angle,  θ	hetaθ , so that the light ray is totally internally reflected inside the fiber?

Accepted Answer

A)   24.1º
B)   26.4º
C)   28.2º
D)   30.3º
E)   32.7º F) A) and D)
G) B) and D)

Question 20

Use the following figure below for the next three problems 1 = 1.45 with a material of refractive index n2 = 1.38. What is the critical angle,  	heta c, at the core-cladding interface? A)  44º B)  46º C)  55º D)  72º E)  None of these is correct. " class="answers-bank-image d-inline" rel="preload" > The figure shows a cross-section of a fiber optic.
-A fiber optic is made by cladding a thin fiber core of refractive index n1 = 1.45 with a material of refractive index n2 = 1.38. What is the critical angle,  θ	hetaθ c, at the core-cladding interface?

Accepted Answer

A)   44º
B)   46º
C)   55º
D)   72º
E)   None of these is correct. F) C) and D)
G) B) and C)

Exam 11: Properties of Light

"To find the value of the resultant displacement for overlapping waves at any point at a particular instant, it is only necessary to add the values of the displacements for the individual waves." This is a statement of

Correct Answer
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Correct Answer
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Light that has been traveling in a medium with an index of refraction n₂ is incident on the boundary surface of another medium with an index of refraction n₁. Given a sufficient angle of incidence, which of the following conditions must be satisfied for total internal reflection to occur?

Correct Answer
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Correct Answer
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Correct Answer
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The wavelength of green light in air is 500 nm. The wavelength of this light in glass of index of refraction 1.60 is approximately

Correct Answer
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Correct Answer
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Communications satellites are usually placed in geosynchronous orbits, a distance of 4.43 * 10⁷ m from the center of Earth. What is the time lag for a signal sent from one point on Earth's surface to another via such a satellite? (The radius of Earth R_E = 6.370 *10⁶ m.)

Correct Answer
verified

Sound waves differ from light waves in many respects. One important difference is that sound waves cannot

Correct Answer
verified

Mission Control sends a brief wake-up call to astronauts in a distant spaceship. Five seconds after the call is sent, Mission Control hears the waking groans of the astronauts. How far away (at most) from Earth is the spaceship?

Correct Answer
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Correct Answer
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From directly above, you're watching a fish swim 1.83 m beneath the surface of a clear lake (n = 1.33) . How far beneath the surface does the fish seem to be?

Correct Answer
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Correct Answer
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Correct Answer
verified

Correct Answer
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Light is incident at an angle of 60 $\degree$ at an air to glass interface. If the angle of refraction inside the glass is 32 $\degree$ , then calculate the speed of light within the glass.

Correct Answer
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A 6 $\degree$ prism has a refractive index of 1.52. Calculate the angle of incidence for the initial light ray that is then refracted inside the prism and just undergoes total internal reflection at the opposite face of the prism.

Correct Answer
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The optical phenomenon that is usually cited as demonstrating the transverse wave nature of light is

Correct Answer
verified

Correct Answer
verified

Two polarizers have their transmission axes at an angle $\theta$ . Unpolarized light of intensity I is incident on the first polarizer. What is the intensity of the light transmitted by the second polarizer?

Correct Answer
verified

Exam 11: Properties of Light

"To find the value of the resultant displacement for overlapping waves at any point at a particular instant, it is only necessary to add the values of the displacements for the individual waves." This is a statement of

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Light that has been traveling in a medium with an index of refraction n2 is incident on the boundary surface of another medium with an index of refraction n1. Given a sufficient angle of incidence, which of the following conditions must be satisfied for total internal reflection to occur?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

A ray of monochromatic light in air falls on the upper surface of two parallel-sided slabs of transparent material, as shown in the diagram. The angle of refraction ϕ\phiϕ in the lower slab is approximately

Correct AnswerverifiedShow Answer

The wavelength of green light in air is 500 nm. The wavelength of this light in glass of index of refraction 1.60 is approximately

Correct AnswerverifiedShow Answer

A plane wavefront of light (AA') approaches an air-water interface as shown. n < n'. The refracted wave is best represented by

Correct AnswerverifiedShow Answer

Communications satellites are usually placed in geosynchronous orbits, a distance of 4.43 * 107 m from the center of Earth. What is the time lag for a signal sent from one point on Earth's surface to another via such a satellite? (The radius of Earth RE = 6.370 *106 m.)

Correct AnswerverifiedShow Answer

Sound waves differ from light waves in many respects. One important difference is that sound waves cannot

Correct AnswerverifiedShow Answer

Mission Control sends a brief wake-up call to astronauts in a distant spaceship. Five seconds after the call is sent, Mission Control hears the waking groans of the astronauts. How far away (at most) from Earth is the spaceship?

Correct AnswerverifiedShow Answer

If the incident beam in the figure is unpolarized and the reflected beam is completely plane polarized, the index of refraction of the glass must be

Correct AnswerverifiedShow Answer

From directly above, you're watching a fish swim 1.83 m beneath the surface of a clear lake (n = 1.33) . How far beneath the surface does the fish seem to be?

Correct AnswerverifiedShow Answer

The angle of incidence θ\thetaθ 1 that will cause the unpolarized light to be reflected as completely plane-polarized light is called

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

A ray of light traveling in air enters the end of a rectangular block of a material that has an idex of refraction n = 1.35. The largest value of the angle θ\thetaθ for which total internal reflection occurs at the upper surface of the material is approximately

Correct AnswerverifiedShow Answer

Light is incident at an angle of 60 °\degree° at an air to glass interface. If the angle of refraction inside the glass is 32 °\degree° , then calculate the speed of light within the glass.

Correct AnswerverifiedShow Answer

A 6 °\degree° prism has a refractive index of 1.52. Calculate the angle of incidence for the initial light ray that is then refracted inside the prism and just undergoes total internal reflection at the opposite face of the prism.

Correct AnswerverifiedShow Answer

The optical phenomenon that is usually cited as demonstrating the transverse wave nature of light is

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Two polarizers have their transmission axes at an angle θ\thetaθ . Unpolarized light of intensity I is incident on the first polarizer. What is the intensity of the light transmitted by the second polarizer?

Correct AnswerverifiedShow Answer

Correct Answer
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Correct Answer
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Light that has been traveling in a medium with an index of refraction n₂ is incident on the boundary surface of another medium with an index of refraction n₁. Given a sufficient angle of incidence, which of the following conditions must be satisfied for total internal reflection to occur?

Correct Answer
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Correct Answer
verified

Correct Answer
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Correct Answer
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Correct Answer
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Communications satellites are usually placed in geosynchronous orbits, a distance of 4.43 * 10⁷ m from the center of Earth. What is the time lag for a signal sent from one point on Earth's surface to another via such a satellite? (The radius of Earth R_E = 6.370 *10⁶ m.)

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Light is incident at an angle of 60 $\degree$ at an air to glass interface. If the angle of refraction inside the glass is 32 $\degree$ , then calculate the speed of light within the glass.

Correct Answer
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A 6 $\degree$ prism has a refractive index of 1.52. Calculate the angle of incidence for the initial light ray that is then refracted inside the prism and just undergoes total internal reflection at the opposite face of the prism.

Correct Answer
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Correct Answer
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Correct Answer
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Two polarizers have their transmission axes at an angle $\theta$ . Unpolarized light of intensity I is incident on the first polarizer. What is the intensity of the light transmitted by the second polarizer?

Correct Answer
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