Question 1

Diamond has an index of refraction of 2.419.What is the critical angle for internal reflection inside a diamond that is in air?

Accepted Answer

A) 24.4$\degree$ 
B) 48.8$\degree$ 
C) 155$\degree$ 
D) 131$\degree$ 
A) 24.4$\degree$ 
B) 48.8$\degree$ 
C) 155$\degree$ 
D) 131$\degree$ A

Question 2

Fused quartz has an index of refraction of 1.56 for light from a 560-nm source.What is the speed of light for this wavelength within the quartz? (c = 3.00 * 108 m/s)

Accepted Answer

A) 1.56 * 108 m/s 
B) 1.92 * 108 m/s 
C) 2.19 * 108 m/s 
D) 4.68 * 108 m/s 
A) 1.56 * 108 m/s 
B) 1.92 * 108 m/s 
C) 2.19 * 108 m/s 
D) 4.68 * 108 m/s B

Question 3

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 30$\degree$ with the normal.Find the angle of the corresponding refracted ray.

Accepted Answer

A) 55.5$\degree$ 
B) 29.4$\degree$ 
C) 31.4$\degree$ 
D) 19.2$\degree$ 
A) 55.5$\degree$ 
B) 29.4$\degree$ 
C) 31.4$\degree$ 
D) 19.2$\degree$ C

Question 4

A fish is 1.2 m beneath the surface of a still pond of water.At what maximum angle can the fish look toward the surface (measured with respect to the normal to the surface) in order to see a fisherman sitting on a distant bank? (for water, n = 1.333)

Accepted Answer

A) 18.6$\degree$ 
B) 37.2$\degree$ 
C) 48.6$\degree$ 
D) The fish will not see the fisherman at any angle. 
A) 18.6$\degree$ 
B) 37.2$\degree$ 
C) 48.6$\degree$ 
D) The fish will not see the fisherman at any angle.

Question 5

A monochromatic light source emits a wavelength of 490 nm in air.When passing through a liquid, the wavelength reduces to 429 nm.What is the liquid's index of refraction?

Accepted Answer

A) 1.26 
B) 1.49 
C) 1.14 
D) 1.33 
A) 1.26 
B) 1.49 
C) 1.14 
D) 1.33

Question 6

Dispersion occurs when:

Accepted Answer

A) some materials bend light more than other materials. 
B) a material slows down some wavelengths more than others. 
C) a material changes some frequencies more than others. 
D) light has different speeds in different materials. 
A) some materials bend light more than other materials. 
B) a material slows down some wavelengths more than others. 
C) a material changes some frequencies more than others. 
D) light has different speeds in different materials.

Question 7

A beam of monochromatic light goes from material 1 with index of refraction n1 into material 2 with index of refraction n2. The frequency of light in material 1 is f1 and in material 2 is f2. What is the ratio of f1/f2?

Accepted Answer

A) n1/n2 
B) n2/n1 
C) 1 
D) The values of n1 and n2 must be known to find the answer. 
A) n1/n2 
B) n2/n1 
C) 1 
D) The values of n1 and n2 must be known to find the answer.

Question 8

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. 
A) specular reflection. 
B) diffuse reflection. 
C) retroreflection. 
D) double reflection.

Question 9

A ray of light is incident on the mid-point of a glass prism surface at an angle of 20$\degree$ with the normal.For the glass, n = 1.60, and the prism apex angle is 35$\degree$.What is the angle of incidence at the glass-to-air surface on the side opposite where the ray exits the prism?

Accepted Answer

A) 38.0$\degree$ 
B) 35.1$\degree$ 
C) 22.7$\degree$ 
D) 12.3$\degree$ 
A) 38.0$\degree$ 
B) 35.1$\degree$ 
C) 22.7$\degree$ 
D) 12.3$\degree$

Question 10

When light of one wavelength from air hits a smooth piece of glass at an angle, which of the following will not occur?

Accepted Answer

A) reflection 
B) refraction 
C) dispersion 
D) All of the above will occur. 
A) reflection 
B) refraction 
C) dispersion 
D) All of the above will occur.

Question 11

Water has an index of refraction of 1.333.What is the speed of light through it? (c = 3.00 * 108 m/s)

Accepted Answer

A) 4.00 * 108 m/s 
B) 2.25 * 108 m/s 
C) 4.46 * 108 m/s 
D) 1.46 * 108 m/s 
A) 4.00 * 108 m/s 
B) 2.25 * 108 m/s 
C) 4.46 * 108 m/s 
D) 1.46 * 108 m/s

Question 12

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. 
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.

Question 13

When light from air hits a smooth piece of glass with the ray perpendicular to the glass surface, the part of the light passing into the glass:

Accepted Answer

A) will not change its speed. 
B) will not change its frequency. 
C) will not change its wavelength. 
D) will not change its intensity. 
A) will not change its speed. 
B) will not change its frequency. 
C) will not change its wavelength. 
D) will not change its intensity.

Question 14

The wave-particle duality of light means that, in the same experiment:

Accepted Answer

A) light will act both like a wave and like a particle. 
B) light will act either like a wave or like a particle. 
C) light will not act like either a wave or a particle. 
D) light always exists as two waves or as two particles. 
A) light will act both like a wave and like a particle. 
B) light will act either like a wave or like a particle. 
C) light will not act like either a wave or a particle. 
D) light always exists as two waves or as two particles.

Question 15

White light is sent through a prism, and the various colors are separated in typical fashion.Which of the following colors would have the highest index of refraction in this prism?

Accepted Answer

A) red 
B) green 
C) yellow 
D) blue 
A) red 
B) green 
C) yellow 
D) blue

Question 16

When light passing through a prism undergoes dispersion, the effect is a result of:

Accepted Answer

A) different wavelengths traveling at different speeds. 
B) different wavelengths having different indices of refraction. 
C) different wavelengths refracting differently. 
D) All of the above. 
A) different wavelengths traveling at different speeds. 
B) different wavelengths having different indices of refraction. 
C) different wavelengths refracting differently. 
D) All of the above.

Question 17

Who formulated the theory explaining the photoelectric effect?

Accepted Answer

A) Hertz 
B) Maxwell 
C) Newton 
D) Einstein 
A) Hertz 
B) Maxwell 
C) Newton 
D) Einstein

Question 18

A light ray in air enters and passes through a block of glass.What can be stated with regard to its speed after it emerges from the block?

Accepted Answer

A) Speed is less than when in glass. 
B) Speed is less than before it entered glass. 
C) Speed is same as that in glass. 
D) Speed is same as that before it entered glass. 
A) Speed is less than when in glass. 
B) Speed is less than before it entered glass. 
C) Speed is same as that in glass. 
D) Speed is same as that before it entered glass.

Question 19

Which of the following describes what will happen to a light ray incident on a glass-to-air boundary at greater than the critical angle?

Accepted Answer

A) total reflection 
B) total transmission 
C) partial reflection, partial transmission 
D) partial reflection, total transmission 
A) total reflection 
B) total transmission 
C) partial reflection, partial transmission 
D) partial reflection, total transmission

Question 20

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 37.0$\degree$ with the normal, what is the incident angle at the oil-to-water surface?

Accepted Answer

A) 18.1$\degree$ 
B) 24.2$\degree$ 
C) 27.3$\degree$ 
D) 37.0$\degree$ 
A) 18.1$\degree$ 
B) 24.2$\degree$ 
C) 27.3$\degree$ 
D) 37.0$\degree$

Exam 22: Reflection and Refraction of Light

Diamond has an index of refraction of 2.419.What is the critical angle for internal reflection inside a diamond that is in air?

Fused quartz has an index of refraction of 1.56 for light from a 560-nm source.What is the speed of light for this wavelength within the quartz? (c = 3.00 * 108 m/s)

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 30 °\degree° with the normal.Find the angle of the corresponding refracted ray.

A fish is 1.2 m beneath the surface of a still pond of water.At what maximum angle can the fish look toward the surface (measured with respect to the normal to the surface) in order to see a fisherman sitting on a distant bank? (for water, n = 1.333)

A monochromatic light source emits a wavelength of 490 nm in air.When passing through a liquid, the wavelength reduces to 429 nm.What is the liquid's index of refraction?

Dispersion occurs when:

A beam of monochromatic light goes from material 1 with index of refraction n1 into material 2 with index of refraction n2. The frequency of light in material 1 is f1 and in material 2 is f2. What is the ratio of f1/f2?

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

A ray of light is incident on the mid-point of a glass prism surface at an angle of 20 °\degree° with the normal.For the glass, n = 1.60, and the prism apex angle is 35 °\degree° .What is the angle of incidence at the glass-to-air surface on the side opposite where the ray exits the prism?

When light of one wavelength from air hits a smooth piece of glass at an angle, which of the following will not occur?

Water has an index of refraction of 1.333.What is the speed of light through it? (c = 3.00 * 108 m/s)

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

When light from air hits a smooth piece of glass with the ray perpendicular to the glass surface, the part of the light passing into the glass:

The wave-particle duality of light means that, in the same experiment:

White light is sent through a prism, and the various colors are separated in typical fashion.Which of the following colors would have the highest index of refraction in this prism?

When light passing through a prism undergoes dispersion, the effect is a result of:

Who formulated the theory explaining the photoelectric effect?

A light ray in air enters and passes through a block of glass.What can be stated with regard to its speed after it emerges from the block?

Which of the following describes what will happen to a light ray incident on a glass-to-air boundary at greater than the critical angle?

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 37.0 °\degree° with the normal, what is the incident angle at the oil-to-water surface?

Introduction

Motion in One Dimension

Vectors and Two-Dimensional Motion

The Laws of Motion

Energy

Momentum and Collisions

Rotational Motion and the Law of Gravity

Rotational Equilibrium and Rotational Dynamics

Solids and Fluids

Thermal Physics

Energy in Thermal Processes

The Laws of Thermodynamics

Vibrations and Waves

Sound

Electric Forces and Electric Fields

Electrical Energy and Capacitance

Current and Resistance

Direct-Current Circuits

Magnetism

Induced Voltages and Inductance

Alternating Current Circuits and Electromagnetic Waves

Mirrors and Lenses

Wave Optics

Optical Instruments

Relativity

Quantum Physics

Atomic Physics

Nuclear Physics

Nuclear Energy and Elementary Particles

Filters

Fused quartz has an index of refraction of 1.56 for light from a 560-nm source.What is the speed of light for this wavelength within the quartz? (c = 3.00 * 10⁸ m/s)

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 30 $\degree$ with the normal.Find the angle of the corresponding refracted ray.

A beam of monochromatic light goes from material 1 with index of refraction n₁ into material 2 with index of refraction n₂. The frequency of light in material 1 is f₁ and in material 2 is f₂. What is the ratio of f₁/f₂?

A ray of light is incident on the mid-point of a glass prism surface at an angle of 20 $\degree$ with the normal.For the glass, n = 1.60, and the prism apex angle is 35 $\degree$ .What is the angle of incidence at the glass-to-air surface on the side opposite where the ray exits the prism?

Water has an index of refraction of 1.333.What is the speed of light through it? (c = 3.00 * 10⁸m/s)

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 37.0 $\degree$ with the normal, what is the incident angle at the oil-to-water surface?