Question 1

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?

Accepted Answer

A)   9.55 * 1014 
B)   9.55* 1015 
C)   8.24 * 1015 
D)   6.53 *1015 
E)   4.78 *1015 F) None of the above
G) C) and D)

Question 2

The index of refraction is related to the prism angle and the angle of minimum deviation by n = sin ½( δ\deltaδ  +  ϕ\phiϕ  ) /sin ½ ϕ\phiϕ  
The angle of minimum deviation in the figure is angle

Accepted Answer

A)   1
B)   2
C)   3
D)   4
E)   5 F) C) and D)
G) A) and D)

Question 3

For the prism immersed in water (n = 1.33) , the minimum index of refraction that will produce total reflection of the indicated ray is approximately

Accepted Answer

A)   0.94
B)   1.28
C)   1.50
D)   1.65
E)   1.88F) C) and D)
G) A) and E)

Question 4

A ray of light (ab)  is incident on the surface of a piece of glass at such an angle that the reflected ray (bc)  is totally polarized. The directed line segment that represents the refracted ray is

Accepted Answer

A)   1
B)   2
C)   3
D)   4
E)   None of these is correct.F) B) and D)
G) B) and E)

Question 5

If the refractive index of glass is 1.5 and the refractive index of a particular liquid is 1.38, then calculate the value for the critical angle of total internal reflection at the liquid-glass interface.

Accepted Answer

A)   23.1 °\degree° 
B)   66.9 °\degree° 
C)   82.8 °\degree° 
D)   42.6 °\degree° 
E)   None of these is correct. F) B) and C)
G) A) and B)

Question 6

A ray of light is shown being reflected at the surface of a material. If the reflected ray is completely plane polarized, the index of refraction of the material is approximately

Accepted Answer

A)   1.3
B)   1.9
C)   0.63
D)   0.80
E)   1.8F) B) and E)
G) A) and B)

Question 7

If the wavelength  λ\lambdaλ  of the incident light is large compared with the size of the atom, the probability of elastic scattering varies as

Accepted Answer

A)    λ\lambdaλ 
B)    λ\lambdaλ 4 
C)    λ\lambdaλ -4 
D)    λ\lambdaλ 2 
E)    λ\lambdaλ -3  F) C) and E)
G) A) and D)

Question 8

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

Accepted Answer

A)   9.55 * 1014 Hz
B)   9.55 *1015 Hz
C)   8.46 * 1015 Hz
D)   6.53 *1015 Hz
E)   4.78 *1015 HzF) A) and C)
G) A) and E)

Question 9

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	hetaθ 1 and  θ	hetaθ 2 are the angles of incidence and refraction.)

Accepted Answer

A)   f1 sin  θ	hetaθ 1 = f2 sin  θ	hetaθ 2 
B)   f1v2 = f2v1 
C)   f1 = f2 
D)   f1v1 = f2v2 
E)   f1 sin  θ	hetaθ 2 = f2 sin  θ	hetaθ 1  F) A) and B)
G) All of the above

Question 10

The reflected ray that is most nearly completely plane polarized is

Accepted Answer

A)   1
B)   2
C)   3
D)   4
E)   5F) B) and C)
G) B) and D)

Question 11

Light traveling in a transparent medium with an index of refraction n1 is incident on a transparent boundary with a second transparent medium with an index n2. Very little light is transmitted into the second medium. Which of the following statements must be true?

Accepted Answer

A)   n1 equals n2
B)   n1 is somewhat greater than n2
C)   n2 is somewhat greater than n1
D)   n2 is much greater than n1
E)   Either index of refraction is much greater than the otherF) B) and D)
G) C) and E)

Question 12

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?

Accepted Answer

A)   19.8 cm
B)   23.1 cm
C)   17.7 cm
D)   9.9 cm
E)   None of these is correct.F) A) and C)
G) C) and E)

Question 13

A ray of light strikes a slab of glass at an angle of incidence of 35º. The angle of refraction in the glass is

Accepted Answer

A)   22º
B)   63º
C)   27º
D)   90º
E)   None of these is correct.F) B) and E)
G) A) and D)

Question 14

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

Accepted Answer

A)   absorption
B)   reflection
C)   birefringence
D)   diffraction
E)   scatteringF) C) and D)
G) A) and D)

Question 15

An unpolarized beam of light is incident on a group of three polarizing sheets that are lined up so that the characteristic direction of each is rotated by 45º clockwise with respect to the preceding sheet. The fraction of the incident intensity Io that is transmitted is

Accepted Answer

A)   zero
B)   Io/2
C)   Io/4
D)   Io/6
E)   Io/8F) A) and E)
G) A) and C)

Question 16

A 60 °\degree°  prism has a refractive index of 1.71. Calculate the angle of emergence out of the prism for a ray that enters one side at an angle almost parallel to one face, i.e. at 90 °\degree°  to the normal.

Accepted Answer

A)   24.3 °\degree° 
B)   35.8 °\degree° 
C)   45.1 °\degree° 
D)   48.7 °\degree° 
E)   55.3 °\degree°F) A) and D)
G) C) and E)

Question 17

The principle of superposition states:

Accepted Answer

A)   The effect observed at each point of a wave made up of two or more waves is the sum of the effects that the individual waves would produce at that point.
B)   Huygens' wavelets cannot be allowed to extend across regions where the phase velocity of the wave changes abruptly.
C)   Sources of radiation whose phase angles are maintained at constant differences are said to be coherent.
D)   A characteristic phenomenon of wave propagation is the tendency of a wave to expand around and behind any obstacles it chances to encounter.
E)   A good source of waves at a particular frequency is a good detector of waves at the same frequency.F) A) and D)
G) None of the above

Question 18

Ultra fast pulse lasers can emit pulses of the order 10 fs. If each pulse that is 10 fs long and the wavelength of the laser is 500 nm, the number of wavelengths in each pulse is

Accepted Answer

A)   6
B)   10
C)   12
D)   50
E)   120F) A) and E)
G) A) and D)

Question 19

The diagram shows a ray of light entering a block of polyethylene (n = 1.5) . The path of this ray after it has passed through the block is

Accepted Answer

A)   1
B)   2
C)   3
D)   4
E)   5F) All of the above
G) A) and E)

Question 20

When light is reflected from a plane surface of glass at the polarizing angle, the

Accepted Answer

A)   reflected ray is at right angles to the incident ray.
B)   angle of reflection is equal to the angle of refraction.
C)   incident ray is at right angles to the refracted ray.
D)   reflected ray is at right angles to the refracted ray.
E)   intensity of the reflected light is a maximum.F) C) and D)
G) A) and D)

Exam 11: Properties of Light

The principle of superposition states:

Correct Answer
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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?

Correct Answer
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If the wavelength $\lambda$ of the incident light is large compared with the size of the atom, the probability of elastic scattering varies as

Correct Answer
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Correct Answer
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Correct Answer
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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.)

Correct Answer
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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?

Correct Answer
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The reflected ray that is most nearly completely plane polarized is

Correct Answer
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Light traveling in a transparent medium with an index of refraction n₁ is incident on a transparent boundary with a second transparent medium with an index n₂. Very little light is transmitted into the second medium. Which of the following statements must be true?

Correct Answer
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Ultra fast pulse lasers can emit pulses of the order 10 fs. If each pulse that is 10 fs long and the wavelength of the laser is 500 nm, the number of wavelengths in each pulse is

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

Correct Answer
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An unpolarized beam of light is incident on a group of three polarizing sheets that are lined up so that the characteristic direction of each is rotated by 45º clockwise with respect to the preceding sheet. The fraction of the incident intensity I_o that is transmitted is

Correct Answer
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$A ray of light strikes a slab of glass at an angle of incidence of 35º. The angle of refraction in the glass is A) 22º B) 63º C) 27º D) 90º E) None of these is correct.$ A ray of light strikes a slab of glass at an angle of incidence of 35º. The angle of refraction in the glass is

Correct Answer
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The diagram shows a ray of light entering a block of polyethylene (n = 1.5) . The path of this ray after it has passed through the block is

Correct Answer
verified

If the refractive index of glass is 1.5 and the refractive index of a particular liquid is 1.38, then calculate the value for the critical angle of total internal reflection at the liquid-glass interface.

Correct Answer
verified

When light is reflected from a plane surface of glass at the polarizing angle, the

Correct Answer
verified

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

Correct Answer
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Correct Answer
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A 60 $\degree$ prism has a refractive index of 1.71. Calculate the angle of emergence out of the prism for a ray that enters one side at an angle almost parallel to one face, i.e. at 90 $\degree$ to the normal.

Correct Answer
verified

Exam 11: Properties of Light

The principle of superposition states:

Correct AnswerverifiedShow Answer

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?

Correct AnswerverifiedShow Answer

If the wavelength λ\lambdaλ of the incident light is large compared with the size of the atom, the probability of elastic scattering varies as

Correct AnswerverifiedShow Answer

A ray of light is shown being reflected at the surface of a material. If the reflected ray is completely plane polarized, the index of refraction of the material is approximately

Correct AnswerverifiedShow Answer

For the prism immersed in water (n = 1.33) , the minimum index of refraction that will produce total reflection of the indicated ray is approximately

Correct AnswerverifiedShow Answer

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.)

Correct AnswerverifiedShow Answer

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?

Correct AnswerverifiedShow Answer

The reflected ray that is most nearly completely plane polarized is

Correct AnswerverifiedShow Answer

Light traveling in a transparent medium with an index of refraction n1 is incident on a transparent boundary with a second transparent medium with an index n2. Very little light is transmitted into the second medium. Which of the following statements must be true?

Correct AnswerverifiedShow Answer

Ultra fast pulse lasers can emit pulses of the order 10 fs. If each pulse that is 10 fs long and the wavelength of the laser is 500 nm, the number of wavelengths in each pulse is

Correct AnswerverifiedShow Answer

A ray of light (ab) is incident on the surface of a piece of glass at such an angle that the reflected ray (bc) is totally polarized. The directed line segment that represents the refracted ray is

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

An unpolarized beam of light is incident on a group of three polarizing sheets that are lined up so that the characteristic direction of each is rotated by 45º clockwise with respect to the preceding sheet. The fraction of the incident intensity Io that is transmitted is

Correct AnswerverifiedShow Answer

A ray of light strikes a slab of glass at an angle of incidence of 35º. The angle of refraction in the glass is

Correct AnswerverifiedShow Answer

The diagram shows a ray of light entering a block of polyethylene (n = 1.5) . The path of this ray after it has passed through the block is

Correct AnswerverifiedShow Answer

If the refractive index of glass is 1.5 and the refractive index of a particular liquid is 1.38, then calculate the value for the critical angle of total internal reflection at the liquid-glass interface.

Correct AnswerverifiedShow Answer

When light is reflected from a plane surface of glass at the polarizing angle, the

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The index of refraction is related to the prism angle and the angle of minimum deviation by n = sin ½( δ\deltaδ + ϕ\phiϕ ) /sin ½ ϕ\phiϕ The angle of minimum deviation in the figure is angle

Correct AnswerverifiedShow Answer

A 60 °\degree° prism has a refractive index of 1.71. Calculate the angle of emergence out of the prism for a ray that enters one side at an angle almost parallel to one face, i.e. at 90 °\degree° to the normal.

Correct AnswerverifiedShow Answer

Correct Answer
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Correct Answer
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If the wavelength $\lambda$ of the incident light is large compared with the size of the atom, the probability of elastic scattering varies as

Correct Answer
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Correct Answer
verified

Correct Answer
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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.)

Correct Answer
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Correct Answer
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Correct Answer
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Light traveling in a transparent medium with an index of refraction n₁ is incident on a transparent boundary with a second transparent medium with an index n₂. Very little light is transmitted into the second medium. Which of the following statements must be true?

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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An unpolarized beam of light is incident on a group of three polarizing sheets that are lined up so that the characteristic direction of each is rotated by 45º clockwise with respect to the preceding sheet. The fraction of the incident intensity I_o that is transmitted is

Correct Answer
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$A ray of light strikes a slab of glass at an angle of incidence of 35º. The angle of refraction in the glass is A) 22º B) 63º C) 27º D) 90º E) None of these is correct.$ A ray of light strikes a slab of glass at an angle of incidence of 35º. The angle of refraction in the glass is

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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A 60 $\degree$ prism has a refractive index of 1.71. Calculate the angle of emergence out of the prism for a ray that enters one side at an angle almost parallel to one face, i.e. at 90 $\degree$ to the normal.

Correct Answer
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