Question 1

Two mirrors are joined together along a common side,the planes of the mirrors separated by the angle θ.If the joined mirrors can be used as a retroreflector when a beam of light strikes both surfaces (one after the other) ,what is the value of θ?

Accepted Answer

A)   30°
B)   45°
C)   90°
D)   135°E) A) and B)
F) A) and C)

Question 2

A beam of light in air is incident at an angle of 15° to the surface of a rectangular block of clear plastic (n = 1.46) .The light beam first passes through the block and re-emerges from the opposite side into air at what angle to the normal to that surface?

Accepted Answer

A)   22°
B)   10°
C)   15°
D)   18°
E)   ​0.39°F) A) and D)
G) A) and C)

Question 3

When light reflects and produces a clear image,this reflection is referred to as:

Accepted Answer

A)   specular reflection.
B)   diffuse reflection.
C)   retroreflection.
D)   double reflection.E) C) and D)
F) None of the above

Question 4

A light ray in air is incident on an air-to-glass boundary at an angle of 31.0° and is refracted in the glass at an angle of 25.0° with the normal.Find the index of refraction of the glass.

Accepted Answer

A)   1.24
B)   2.30
C)   1.49
D)   1.22
E)   ​1.82F) A) and B)
G) A) and C)

Question 5

Dez pours carbon tetrachloride (n = 1.46) into a container made of crown glass (n = 1.52) .The light ray in glass incident on the glass-to-liquid boundary makes an angle of 13.0° with the normal.Find the angle of the corresponding refracted ray.

Accepted Answer

A)   12.5°
B)   0.24°
C)   13.5°
D)   23.8°
E)   ​13.0°F) A) and E)
G) A) and D)

Question 6

Three materials with n1 2 3 are arranged in layers of uniform thickness.A light ray in air enters the first layer at an angle of incidence of 30° and the ray eventually exits the third layer at the refracted angle θ in air.What is the value of θ?

Accepted Answer

A)   Some angle less than 30°.
B)   30°.
C)   Some angle more than 30°.
D)   Insufficient information to answer.E) All of the above
F) None of the above

Question 7

Helium-neon laser light has a wavelength in air of 632.8 nm.What is the energy of a single photon in the beam? (h = 6.626 × 10−34 J⋅s and c = 3.00 × 108 m/s) .

Accepted Answer

A)   3.14 × 10−19 J
B)   5.40 × 10−19 J
C)   7.62 × 10−19 J
D)   1.15 × 10−18 JE) A) and D)
F) None of the above

Question 8

Who formulated the theory explaining the photoelectric effect?

Accepted Answer

A)   Hertz
B)   Maxwell
C)   Newton
D)   EinsteinE) A) and B)
F) A) and C)

Question 9

A ray of light is incident on a liquid-to-glass interface at an angle of 38.1°.Indices of refraction for the liquid and glass are,respectively,1.87 and 1.60.What is the angle of refraction for the ray moving through the glass?

Accepted Answer

A)   26.9°
B)   31.9°
C)   46.2°
D)   32.6°
E)   ​44.5°F) D) and E)
G) A) and B)

Question 10

What is the energy of a photon of frequency 3.80 × 1014 Hz? (h = 6.626 × 10−34 J⋅s)

Accepted Answer

A)   2.52E-19 J
B)   1.74E-20 J
C)   5.73E+47 J
D)   1.74E-48 J
E)   ​3.97E+18 JF) A) and B)
G) A) and C)

Question 11

When white light disperses as it passes through a prism,which of the following colors moves at the lowest speed in the prism?

Accepted Answer

A)   blue
B)   green
C)   yellow
D)   redE) All of the above
F) B) and C)

Question 12

Fiber optics has to do with:

Accepted Answer

A)   the color of fabrics.
B)   light having fiber characteristics as well as wave and particle characteristics.
C)   string theory.
D)   none of the above.E) A) and B)
F) C) and D)

Question 13

A ray of white light,incident upon a glass prism,is dispersed into its various color components.Which one of the following colors experiences the greatest angle of deviation?

Accepted Answer

A)   orange
B)   violet
C)   red
D)   greenE) A) and B)
F) A) and C)

Question 14

According to present theories of light,in some experiments light seems to be:

Accepted Answer

A)   composed of particles which can neither be created nor destroyed.
B)   a particle whose quantized energy depends on its velocity.
C)   a wave that moves from one place to another if there is material to vibrate.
D)   none of the above.E) B) and C)
F) A) and C)

Question 15

What is the angle of incidence on an air-to-glass boundary if the angle of refraction in the glass (n = 1.52) is 17°?

Accepted Answer

A)   11°.
B)   17°
C)   26°
D)   26°.
E)   ​11°F) C) and D)
G) None of the above

Question 16

Which of the following describes what will happen to a light ray incident on an air-to-glass boundary?

Accepted Answer

A)   total reflection
B)   total transmission
C)   partial reflection,partial transmission
D)   partial reflection,total transmissionE) All of the above
F) C) and D)

Question 17

A ray of light travels from a glass-to-liquid interface at an angle of 56°.Indices of refraction for the glass and liquid are,respectively,1.61 and 1.89.What is the angle of refraction for the ray moving through the liquid?

Accepted Answer

A)   76.7°
B)   44.9°
C)   37.0°
D)   47.7°
E)   ​65.7°F) A) and B)
G) C) and E)

Question 18

An oil film floats on a water surface.The indices of refraction for water and oil,respectively,are 1.333 and 1.466.If a ray of light is incident on the air-to-oil surface at an angle of 25.4° with the normal,what is the incident angle at the oil-to-water surface?

Accepted Answer

A)   18.8°
B)   17.0°
C)   23.0°
D)   25.4°
E)   ​20.8°F) A) and C)
G) None of the above

Question 19

A container of flint glass (n = 1.57) holds a small quantity of benzene (n = 1.501) .What is the critical angle for internal reflection of a ray in the glass when it is incident on the glass-to-liquid surface?

Accepted Answer

A)   87.5°
B)   73.0°
C)   41.8°
D)   39.6°
E)   ​86.0ºF) All of the above
G) A) and D)

Question 20

The lowest possible value for the index of refraction is:

Accepted Answer

A)   0.
B)   1.
C)   0.707.
D)   3-1/2.E) B) and C)
F) A) and D)

Exam 22: Reflection and Refraction of Light

Which of the following describes what will happen to a light ray incident on an air-to-glass boundary?

Correct AnswerverifiedShow Answer

A ray of light travels from a glass-to-liquid interface at an angle of 56°.Indices of refraction for the glass and liquid are,respectively,1.61 and 1.89.What is the angle of refraction for the ray moving through the liquid?

Correct AnswerverifiedShow Answer

An oil film floats on a water surface.The indices of refraction for water and oil,respectively,are 1.333 and 1.466.If a ray of light is incident on the air-to-oil surface at an angle of 25.4° with the normal,what is the incident angle at the oil-to-water surface?

Correct AnswerverifiedShow Answer

Two mirrors are joined together along a common side,the planes of the mirrors separated by the angle θ.If the joined mirrors can be used as a retroreflector when a beam of light strikes both surfaces (one after the other) ,what is the value of θ?

Correct AnswerverifiedShow Answer

According to present theories of light,in some experiments light seems to be:

Correct AnswerverifiedShow Answer

A light ray in air is incident on an air-to-glass boundary at an angle of 31.0° and is refracted in the glass at an angle of 25.0° with the normal.Find the index of refraction of the glass.

Correct AnswerverifiedShow Answer

Helium-neon laser light has a wavelength in air of 632.8 nm.What is the energy of a single photon in the beam? (h = 6.626 × 10−34 J⋅s and c = 3.00 × 108 m/s) .

Correct AnswerverifiedShow Answer

What is the angle of incidence on an air-to-glass boundary if the angle of refraction in the glass (n = 1.52) is 17°?

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When white light disperses as it passes through a prism,which of the following colors moves at the lowest speed in the prism?

Correct AnswerverifiedShow Answer

A ray of white light,incident upon a glass prism,is dispersed into its various color components.Which one of the following colors experiences the greatest angle of deviation?

Correct AnswerverifiedShow Answer

Who formulated the theory explaining the photoelectric effect?

Correct AnswerverifiedShow Answer

The lowest possible value for the index of refraction is:

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Three materials with n1 < n2 < n3 are arranged in layers of uniform thickness.A light ray in air enters the first layer at an angle of incidence of 30° and the ray eventually exits the third layer at the refracted angle θ in air.What is the value of θ?

Correct AnswerverifiedShow Answer

What is the energy of a photon of frequency 3.80 × 1014 Hz? (h = 6.626 × 10−34 J⋅s)

Correct AnswerverifiedShow Answer

A ray of light is incident on a liquid-to-glass interface at an angle of 38.1°.Indices of refraction for the liquid and glass are,respectively,1.87 and 1.60.What is the angle of refraction for the ray moving through the glass?

Correct AnswerverifiedShow Answer

Dez pours carbon tetrachloride (n = 1.46) into a container made of crown glass (n = 1.52) .The light ray in glass incident on the glass-to-liquid boundary makes an angle of 13.0° with the normal.Find the angle of the corresponding refracted ray.

Correct AnswerverifiedShow Answer

Fiber optics has to do with:

Correct AnswerverifiedShow Answer

A beam of light in air is incident at an angle of 15° to the surface of a rectangular block of clear plastic (n = 1.46) .The light beam first passes through the block and re-emerges from the opposite side into air at what angle to the normal to that surface?

Correct AnswerverifiedShow Answer

A container of flint glass (n = 1.57) holds a small quantity of benzene (n = 1.501) .What is the critical angle for internal reflection of a ray in the glass when it is incident on the glass-to-liquid surface?

Correct AnswerverifiedShow Answer

When light reflects and produces a clear image,this reflection is referred to as:

Correct AnswerverifiedShow Answer

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Helium-neon laser light has a wavelength in air of 632.8 nm.What is the energy of a single photon in the beam? (h = 6.626 × 10−³⁴ J⋅s and c = 3.00 × 10⁸ m/s) .

Correct Answer
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Three materials with n₁ < n₂ < n₃ are arranged in layers of uniform thickness.A light ray in air enters the first layer at an angle of incidence of 30° and the ray eventually exits the third layer at the refracted angle θ in air.What is the value of θ?

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What is the energy of a photon of frequency 3.80 × 10¹⁴ Hz? (h = 6.626 × 10−³⁴ J⋅s)

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