Use the following figure below for the next problem. The figure shows a cross- -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,$\theta$c,at the core-cladding interface?

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

Use the following figure to answer the next problem. -If the index of refraction of the glass plate shown is 1.45,the angle of incidence $\theta$1 that will cause the unpolarized light to be reflected as completely plane-polarized light is

A) 8.25º B) 34.6º C) 45.0º D) 55.4º E) 81.7º A) 8.25º B) 34.6º C) 45.0º D) 55.4º E) 81.7º

A light wave traveling at speed v1 in medium 1 passes into medium 2 where its speed is v2.By which of the following equations is the frequency f1 of the wave in medium 1 related to its frequency f2 in medium 2? ($\theta$1 and $\theta$2 are the angles of incidence and refraction.)

A) f1 sin $\theta$1 = f2 sin $\theta$2 B) f1v2 = f2v1 C) f1 = f2 D) f1v1 = f2v2 E) f1 sin $\theta$2 = f2 sin $\theta$1 A) f1 sin $\theta$1 = f2 sin $\theta$2 B) f1v2 = f2v1 C) f1 = f2 D) f1v1 = f2v2 E) f1 sin $\theta$2 = f2 sin $\theta$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?

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

Exam 31: Properties of Light

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?

(Multiple Choice)

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Question 41

A helium-neon laser emits light of wavelength 632.8 nm and has a power output of 3 mW.How many photons are emitted per second by this laser?

(Multiple Choice)

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Question 42

The speed of ultraviolet radiation in free space compared with the speed of visible radiation in free space is

(Multiple Choice)

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Question 43

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

(Multiple Choice)

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Question 44

Use the following figure for the next problem. -The film shows the line spectrum of an unknown element.If the wavelengths of lines (a),(b)and (c)are 410 nm,500 nm and 556 nm respectively,then the wavelength for line (d)is

(Multiple Choice)

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Question 45

You are trying to catch fish by using a spear.You observe a large fish a couple of meters in front of you and a meter below the water surface.In order to hit the fish with your spear you must aim (assume that the fish is stationary and does not swim away in fright)

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Question 46

Use the following figure below for the next problem. $Use the following figure below for the next problem. The figure shows a cross- -A fiber optic is made by cladding a thin fiber core of refractive index n1 = 1.45 with a material of refractive index n2 = 1.38.What is the critical angle, \theta c,at the core-cladding interface?$ The figure shows a cross- -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, $\theta$ _c,at the core-cladding interface?

(Multiple Choice)

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Question 47

Communications satellites are usually placed in geosynchronous orbits,a distance of 4.43 $\times$ 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 $\times$ 10⁶ m.)

(Multiple Choice)

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Question 48

Use the following figure to answer the next problem. $Use the following figure to answer the next problem. -If the index of refraction of the glass plate shown is 1.45,the angle of incidence \theta 1 that will cause the unpolarized light to be reflected as completely plane-polarized light is$ -If the index of refraction of the glass plate shown is 1.45,the angle of incidence $\theta$ ₁ that will cause the unpolarized light to be reflected as completely plane-polarized light is

(Multiple Choice)

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Question 49

Light is circularly polarized if

(Multiple Choice)

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Question 50

The frequency of light that has a photon energy of 3.5 eV is

(Multiple Choice)

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Question 51

Which of the following is not a phenomenon by which polarized light can be produced from unpolarized light?

(Multiple Choice)

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Question 52

A 60^$\circ$ prism has a refractive index of 1.64 for blue light and 1.61 for red light.Calculate the difference in the angle of incidence for the initial red and blue light ray that is refracted inside the prism and just undergoes total internal reflection at the opposite face of the prism.

(Multiple Choice)

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Question 53

A small beam of monochromatic light in air is incident on a large plate of glass with plane-parallel sides at an angle of 30º.The index of refraction of the glass plate for this wavelength is 1.50.The angle of emergence of the light on the far side of the plate is approximately

(Multiple Choice)

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Question 54

A light wave traveling at speed v₁ in medium 1 passes into medium 2 where its speed is v₂.By which of the following equations is the frequency f₁ of the wave in medium 1 related to its frequency f₂ in medium 2? ( $\theta$ ₁ and $\theta$ ₂ are the angles of incidence and refraction.)

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Question 55

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?

(Multiple Choice)

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Question 56

A ray of light passes from air into water,striking the surface of the water with an angle of incidence of 45º.Which of the following four quantities change as the light enters the water: (1)wavelength,(2)frequency,(3)speed of propagation,and (4)direction of propagation?

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Question 57

Use the following figure to answer the next problem. -The plane of polarization of the reflected light lies

(Multiple Choice)

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Question 58

Two clear but non-mixing liquids each of depth 15 cm are placed together in a glass container.The liquids have refractive indices of 1.75 and 1.33.What is the apparent depth of the combination when viewed from above?

(Multiple Choice)

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Question 59

The index of refraction of plate glass is 1.50.The polarizing angle for light incident from air is

(Multiple Choice)

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Question 60

Showing 41 - 60 of 82

Exam 31: Properties of Light

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?

A helium-neon laser emits light of wavelength 632.8 nm and has a power output of 3 mW.How many photons are emitted per second by this laser?

The speed of ultraviolet radiation in free space compared with the speed of visible radiation in free space is

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

Use the following figure for the next problem. -The film shows the line spectrum of an unknown element.If the wavelengths of lines (a),(b)and (c)are 410 nm,500 nm and 556 nm respectively,then the wavelength for line (d)is

You are trying to catch fish by using a spear.You observe a large fish a couple of meters in front of you and a meter below the water surface.In order to hit the fish with your spear you must aim (assume that the fish is stationary and does not swim away in fright)

Use the following figure below for the next problem. The figure shows a cross- -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\thetaθ c,at the core-cladding interface?

Communications satellites are usually placed in geosynchronous orbits,a distance of 4.43 ×\times× 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 ×\times× 106 m.)

Use the following figure to answer the next problem. -If the index of refraction of the glass plate shown is 1.45,the angle of incidence θ\thetaθ 1 that will cause the unpolarized light to be reflected as completely plane-polarized light is

Light is circularly polarized if

The frequency of light that has a photon energy of 3.5 eV is

Which of the following is not a phenomenon by which polarized light can be produced from unpolarized light?

A 60 ∘\circ∘ prism has a refractive index of 1.64 for blue light and 1.61 for red light.Calculate the difference in the angle of incidence for the initial red and blue light ray that is refracted inside the prism and just undergoes total internal reflection at the opposite face of the prism.

A small beam of monochromatic light in air is incident on a large plate of glass with plane-parallel sides at an angle of 30º.The index of refraction of the glass plate for this wavelength is 1.50.The angle of emergence of the light on the far side of the plate is approximately

A light wave traveling at speed v1 in medium 1 passes into medium 2 where its speed is v2.By which of the following equations is the frequency f1 of the wave in medium 1 related to its frequency f2 in medium 2? ( θ\thetaθ 1 and θ\thetaθ 2 are the angles of incidence and refraction.)

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?

A ray of light passes from air into water,striking the surface of the water with an angle of incidence of 45º.Which of the following four quantities change as the light enters the water: (1)wavelength,(2)frequency,(3)speed of propagation,and (4)direction of propagation?

Use the following figure to answer the next problem. -The plane of polarization of the reflected light lies

Two clear but non-mixing liquids each of depth 15 cm are placed together in a glass container.The liquids have refractive indices of 1.75 and 1.33.What is the apparent depth of the combination when viewed from above?

The index of refraction of plate glass is 1.50.The polarizing angle for light incident from air is

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Motion in Two and Three Dimensions

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Communications satellites are usually placed in geosynchronous orbits,a distance of 4.43 $\times$ 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 $\times$ 10⁶ m.)

A 60^$\circ$ prism has a refractive index of 1.64 for blue light and 1.61 for red light.Calculate the difference in the angle of incidence for the initial red and blue light ray that is refracted inside the prism and just undergoes total internal reflection at the opposite face of the prism.

A light wave traveling at speed v₁ in medium 1 passes into medium 2 where its speed is v₂.By which of the following equations is the frequency f₁ of the wave in medium 1 related to its frequency f₂ in medium 2? ( $\theta$ ₁ and $\theta$ ₂ are the angles of incidence and refraction.)

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?