Question 1

Light in air enters a diamond (n = 2.42)at an angle of incidence of 57.0°.What is the angle of refraction inside the diamond?

Accepted Answer

A)  20.3° 
B)  8.23° 
C)  0.354° 
D)  10.4° 
E)  ​57.0° 
A)  20.3° 
B)  8.23° 
C)  0.354° 
D)  10.4° 
E)  ​57.0°

Question 2

A certain kind of glass has nblue = 1.650 for blue light and nred = 1.610 for red light.If a beam of white light (containing all colors)is incident at an angle of 60°,what is the angle between the red and blue light inside the glass?

Accepted Answer

A)  0.90° 
B)  0.88° 
C)  59° 
D)  0.27° 
E)  ​89° 
A)  0.90° 
B)  0.88° 
C)  59° 
D)  0.27° 
E)  ​89°

Question 3

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

Question 4

An optical fiber is made of clear plastic with index of refraction n = 1.52.For what angles with the surface will light remain within the plastic "guide"?

Accepted Answer

A)  ϕ < 33.3° 
B)  ϕ < 59.2° 
C)  ϕ < 41.1° 
D)  ϕ < 48.9° 
E)  ​ϕ < 70.0° 
A)  ϕ < 33.3° 
B)  ϕ < 59.2° 
C)  ϕ < 41.1° 
D)  ϕ < 48.9° 
E)  ​ϕ < 70.0°

Question 5

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 6

A monochromatic beam of light in air has a wavelength of 454 nm in air.It passes through glass (n = 1.52)and then through carbon disulfide (n = 1.63).What is its wavelength in the carbon disulfide?

Accepted Answer

A)  279 nm 
B)  740 nm 
C)  423 nm 
D)  487 nm 
E)  ​299 nm 
A)  279 nm 
B)  740 nm 
C)  423 nm 
D)  487 nm 
E)  ​299 nm

Question 7

A light ray passes from air through a thin plastic slab (n = 1.34)with parallel sides.If the ray in air makes an angle of 33° with the normal after leaving the slab,what is the angle of incidence for the ray in air as it impinges upon the other side of the slab?

Accepted Answer

A)  24° 
B)  33° 
C)  18° 
D)  25° 
E)  ​44° 
A)  24° 
B)  33° 
C)  18° 
D)  25° 
E)  ​44°

Question 8

A rainbow is a result of:

Accepted Answer

A)  different color droplets of water. 
B)  dispersion. 
C)  interference. 
D)  the Huygens Effect. 
A)  different color droplets of water. 
B)  dispersion. 
C)  interference. 
D)  the Huygens Effect.

Question 9

A line representing a wave front for a wave should be drawn:

Accepted Answer

A)  from the source to the receiver. 
B)  from one crest to the preceding crest. 
C)  along one of the crests of the wave. 
D)  in the direction the wave is moving. 
A)  from the source to the receiver. 
B)  from one crest to the preceding crest. 
C)  along one of the crests of the wave. 
D)  in the direction the wave is moving.

Question 10

When light from air hits a smooth piece of glass (n = 1.5)with the ray perpendicular to the glass surface,which of the following will occur?

Accepted Answer

A)  reflection and transmission with θ2 = 0° 
B)  refraction with θ2 = 41.8° 
C)  interference 
D)  All of the above will occur. 
A)  reflection and transmission with θ2 = 0° 
B)  refraction with θ2 = 41.8° 
C)  interference 
D)  All of the above will occur.

Question 11

A monochromatic light source emits a wavelength of 710 nm in air.When passing through a liquid,the wavelength reduces to 654 nm.What is the liquid's index of refraction?

Accepted Answer

A)  1.18 
B)  1.04 
C)  1.09 
D)  1.92 
E)  ​1.85 
A)  1.18 
B)  1.04 
C)  1.09 
D)  1.92 
E)  ​1.85

Question 12

When viewing your image in a hand-held mirror,if you move the mirror away at a speed v,the image appears to:

Accepted Answer

A)  also move away at v. 
B)  move away at 2v. 
C)  move away at v/2. 
D)  not move. 
A)  also move away at v. 
B)  move away at 2v. 
C)  move away at v/2. 
D)  not move.

Question 13

In Huygens's construction,all points on a wave front:

Accepted Answer

A)  act as point sources for the production of secondary spherical waves. 
B)  act as particles. 
C)  demonstrate the dual nature of light. 
D)  must be sources of plane waves. 
A)  act as point sources for the production of secondary spherical waves. 
B)  act as particles. 
C)  demonstrate the dual nature of light. 
D)  must be sources of plane waves.

Question 14

A fiber optic cable (n = 1.62)is submerged in water (n = 1.33).What is the critical angle for light to stay inside the cable?

Accepted Answer

A)  79.7° 
B)  55.2° 
C)  38.1° 
D)  48.8° 
E)  ​30.4º 
A)  79.7° 
B)  55.2° 
C)  38.1° 
D)  48.8° 
E)  ​30.4º

Question 15

A beam of light is incident upon a flat piece of glass (n = 1.50)at an angle of incidence of 56.0°.Part of the beam is transmitted and part is reflected.What is the angle between the reflected and transmitted rays?

Accepted Answer

A)  33.6° 
B)  112° 
C)  90.4° 
D)  89.6° 
E)  ​102° 
A)  33.6° 
B)  112° 
C)  90.4° 
D)  89.6° 
E)  ​102°

Question 16

If light from a 452-nm monochromatic source in air is incident upon the surface of fused quartz (n = 1.56)at an angle of 60°,what is the wavelength of the ray refracted within the quartz?

Accepted Answer

A)  186 nm 
B)  290 nm 
C)  710 nm 
D)  1100 nm 
E)  ​452 nm 
A)  186 nm 
B)  290 nm 
C)  710 nm 
D)  1100 nm 
E)  ​452 nm

Question 17

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 42.3° with the normal,what is the angle of the refracted ray in the water?

Accepted Answer

A)  27.3° 
B)  37.7° 
C)  30.3° 
D)  33.8° 
E)  ​42.3° 
A)  27.3° 
B)  37.7° 
C)  30.3° 
D)  33.8° 
E)  ​42.3°

Question 18

Three flat layers of transparent material are stacked upon one another.The top layer has index of refraction n1,the middle has n2 and the bottom one has n3.If n1 > n2 > n3,and if a ray of light strikes the top layer at an angle of incidence  
,in which layer is the angle of refraction the greatest?

Accepted Answer

A)  the top layer 
B)  the middle layer 
C)  the bottom layer 
D)  Once the ray enters the touching layers,the angle of refraction remains constant. 
A)  the top layer 
B)  the middle layer 
C)  the bottom layer 
D)  Once the ray enters the touching layers,the angle of refraction remains constant.

Question 19

Of the values listed below,which is the greatest possible value for the index of refraction?

Accepted Answer

A)  1.5 
B) 
  
C)  2.0 
D)  3.3 
E)  ​
  
A)  1.5 
B) 
  
C)  2.0 
D)  3.3 
E)  ​

Question 20

Three flat layers of transparent material are stacked upon one another.The top layer has index of refraction n1,the middle has n2 and the bottom one has n3.If n1 2 3,at what angle of incidence will a ray of light traverse the three layers in a single straight line?

Accepted Answer

A) 
  
B) 
  
C) 
  
D)  There is such an angle,but it is not given. 
A) 
  
B) 
  
C) 
  
D)  There is such an angle,but it is not given.

Exam 22: Reflection and Refraction of Light

Light in air enters a diamond (n = 2.42)at an angle of incidence of 57.0°.What is the angle of refraction inside the diamond?

A certain kind of glass has nblue = 1.650 for blue light and nred = 1.610 for red light.If a beam of white light (containing all colors)is incident at an angle of 60°,what is the angle between the red and blue light inside the glass?

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)

An optical fiber is made of clear plastic with index of refraction n = 1.52.For what angles with the surface will light remain within the plastic "guide"?

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?

A monochromatic beam of light in air has a wavelength of 454 nm in air.It passes through glass (n = 1.52)and then through carbon disulfide (n = 1.63).What is its wavelength in the carbon disulfide?

A light ray passes from air through a thin plastic slab (n = 1.34)with parallel sides.If the ray in air makes an angle of 33° with the normal after leaving the slab,what is the angle of incidence for the ray in air as it impinges upon the other side of the slab?

A rainbow is a result of:

A line representing a wave front for a wave should be drawn:

When light from air hits a smooth piece of glass (n = 1.5)with the ray perpendicular to the glass surface,which of the following will occur?

A monochromatic light source emits a wavelength of 710 nm in air.When passing through a liquid,the wavelength reduces to 654 nm.What is the liquid's index of refraction?

When viewing your image in a hand-held mirror,if you move the mirror away at a speed v,the image appears to:

In Huygens's construction,all points on a wave front:

A fiber optic cable (n = 1.62)is submerged in water (n = 1.33).What is the critical angle for light to stay inside the cable?

A beam of light is incident upon a flat piece of glass (n = 1.50)at an angle of incidence of 56.0°.Part of the beam is transmitted and part is reflected.What is the angle between the reflected and transmitted rays?

If light from a 452-nm monochromatic source in air is incident upon the surface of fused quartz (n = 1.56)at an angle of 60°,what is the wavelength of the ray refracted within the quartz?

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 42.3° with the normal,what is the angle of the refracted ray in the water?

Three flat layers of transparent material are stacked upon one another.The top layer has index of refraction n1,the middle has n2 and the bottom one has n3.If n1 > n2 > n3,and if a ray of light strikes the top layer at an angle of incidence ,in which layer is the angle of refraction the greatest?

Of the values listed below,which is the greatest possible value for the index of refraction?

Three flat layers of transparent material are stacked upon one another.The top layer has index of refraction n1,the middle has n2 and the bottom one has n3.If n1 < n2 < n3,at what angle of incidence will a ray of light traverse the three layers in a single straight line?

Introduction

Introduction: Part A

Motion in One Dimension

Motion in One Dimension: Part A

Vectors and Two-Dimensional Motion

Vectors and Two-Dimensional Motion: Part A

The Laws of Motion

The Laws of Motion: Part A

Energy

Energy: Part A

Momentum and Collisions

Momentum and Collisions: Part A

Rotational Motion and the Law of Gravity

Rotational Motion and the Law of Gravity: Part A

Rotational Equilibrium and Rotational Dynamics

Rotational Equilibrium and Rotational Dynamics: Part A

Solids and Fluids

Solids and Fluids: Part A

Thermal Physics

Thermal Physics: Part A

Energy in Thermal Processes Heat and Internal Energy

Energy in Thermal Processes Heat and Internal Energy: Part A

The Laws of Thermodynamics Work in Thermodynamic Processes

The Laws of Thermodynamics Work in Thermodynamic Processes: Part A

Vibrations and Waves

Vibrations and Waves: Part A

Sound

Sound: Part A

Electric Forces and Electric Fields

Electric Forces and Electric Fields: Part A

Electrical Energy and Capacitance

Electrical Energy and Capacitance: Part A

Current and Resistance Electric Current

Current and Resistance Electric Current: Part A

Direct-Current Circuits Sources of EMF

Direct-Current Circuits Sources of EMF: Part A

Magnetism Magnets

Magnetism Magnets: Part A

Induced Voltages and Inductance

Induced Voltages and Inductance: Part A

Alternating-Current Circuits and Electromagnetic Waves

Alternating-Current Circuits and Electromagnetic Waves: Part A

Reflection and Refraction of Light: Part A

Mirrors and Lenses

Mirrors and Lenses: Part A

Wave Optics

Wave Optics: Part A

Optical Instruments

Optical Instruments: Part A

Relativity

Relativity: Part A

Quantum Physics Blackbody Radiation and Plancks Hypothesis

Quantum Physics Blackbody Radiation and Plancks Hypothesis: Part A

Atomic Physics

Atomic Physics: Part A

Nuclear Physics

Nuclear Physics: Part A

Nuclear Energy and Elementary Particles

Nuclear Energy and Elementary Particles: Part A

A certain kind of glass has n_blue = 1.650 for blue light and n_red = 1.610 for red light.If a beam of white light (containing all colors)is incident at an angle of 60°,what is the angle between the red and blue light inside the glass?

Three flat layers of transparent material are stacked upon one another.The top layer has index of refraction n₁,the middle has n₂ and the bottom one has n₃.If n₁ < n₂ < n₃,at what angle of incidence will a ray of light traverse the three layers in a single straight line?