Question 1

Light in air enters a diamond (n = 2.42)at an angle of incidence of 48.0 $\degree$.What is the angle of refraction inside the diamond?

Accepted Answer

A) 17.9 $\degree$ 
B) 19.8 $\degree$ 
C) 24.7 $\degree$ 
D) 45.6 $\degree$ 
A) 17.9 $\degree$ 
B) 19.8 $\degree$ 
C) 24.7 $\degree$ 
D) 45.6 $\degree$

Question 2

Monochromatic light hits a piece of glass.What happens to the wavelength in the glass as the index of refraction increases?

Accepted Answer

A) decreases 
B) increases 
C) remains constant 
D) approaches 3 x 108 m 
A) decreases 
B) increases 
C) remains constant 
D) approaches 3 x 108 m

Question 3

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 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 ray of light is incident on a liquid-to-glass interface at an angle of 35 $\degree$.Indices of refraction for the liquid and glass are,respectively,1.63 and 1.52.What is the angle of refraction for the ray moving through the glass?

Accepted Answer

A) 23 $\degree$ 
B) 30 $\degree$ 
C) 38 $\degree$ 
D) 46 $\degree$ 
A) 23 $\degree$ 
B) 30 $\degree$ 
C) 38 $\degree$ 
D) 46 $\degree$

Question 6

Light of colors 1 and 2 are sent through a prism and the rays of light of color 2 bend more.Which of the following is not true?

Accepted Answer

A) The index of refraction for color 2 is greater than that for color 1. 
B) The two colors of light have different frequencies associated with them. 
C) The speed of light for color 2 is greater than that for color 1 in this prism. 
D) The wavelength for color 1 is different than that for color 2 in this prism. 
A) The index of refraction for color 2 is greater than that for color 1. 
B) The two colors of light have different frequencies associated with them. 
C) The speed of light for color 2 is greater than that for color 1 in this prism. 
D) The wavelength for color 1 is different than that for color 2 in this prism.

Question 7

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

Question 8

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 9

An optical fiber is made of clear plastic with index of refraction n = 1.50.For what angles with the surface will light remain within the plastic "guide"?

Accepted Answer

A) j < 66.6 $\degree$ 
B) j < 57.1 $\degree$ 
C) j < 51.7 $\degree$ 
D) j < 48.2 $\degree$ 
A) j < 66.6 $\degree$ 
B) j < 57.1 $\degree$ 
C) j < 51.7 $\degree$ 
D) j < 48.2 $\degree$

Question 10

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 11

According to the photon energy formula,tripling the frequency of the radiation from a monochromatic source will change the energy content of the individually radiated photons by what factor?

Accepted Answer

A) 0.33 
B) 1.0 
C) 1.73 
D) 3.0 
A) 0.33 
B) 1.0 
C) 1.73 
D) 3.0

Question 12

If the wavelength of a monochromatic source is 490 nm in vacuum,what is the wavelength from the same source when it passes through a liquid where the speed of light is 2.40 x 108 m/s? (c = 3.00 x 108 m/s)

Accepted Answer

A) 671 nm 
B) 612.5 nm 
C) 490 nm 
D) 392 nm 
A) 671 nm 
B) 612.5 nm 
C) 490 nm 
D) 392 nm

Question 13

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 14

A ray of light strikes a thick sheet of glass (n = 1.5)at an angle of 25 $\degree$with the normal.Find the angle of the refracted ray within the glass with respect to the normal.

Accepted Answer

A) 56 $\degree$ 
B) 46 $\degree$ 
C) 25 $\degree$ 
D) 16 $\degree$ 
A) 56 $\degree$ 
B) 46 $\degree$ 
C) 25 $\degree$ 
D) 16 $\degree$

Question 15

If light from a 560-nm monochromatic source in air is incident upon the surface of fused quartz (n = 1.56)at an angle of 60 $\degree$,what is the wavelength of the ray refracted within the quartz?

Accepted Answer

A) 192 nm 
B) 359 nm 
C) 560 nm 
D) 874 nm 
A) 192 nm 
B) 359 nm 
C) 560 nm 
D) 874 nm

Question 16

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 $\degree$

Question 17

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

Question 19

A ray of light travels across a liquid-to-glass interface.If the indices of refraction for the liquid and glass are,respectively,1.75 and 1.52,what is the critical angle at this interface?

Accepted Answer

A) 30.0 $\degree$ 
B) 52.2 $\degree$ 
C) 60.3 $\degree$ 
D) Critical angle does not exist. 
A) 30.0 $\degree$ 
B) 52.2 $\degree$ 
C) 60.3 $\degree$ 
D) Critical angle does not exist.

Question 20

A beam of light in air is incident on the surface of a rectangular block of clear plastic (n = 1.49).If the velocity of the beam before it enters the plastic is 3.00 x 108 m/s,what is its velocity inside the block?

Accepted Answer

A) 3.00 x 108 m/s 
B) 1.93 x 108 m/s 
C) 2.01 x 108 m/s 
D) 1.35 x 108 m/s 
A) 3.00 x 108 m/s 
B) 1.93 x 108 m/s 
C) 2.01 x 108 m/s 
D) 1.35 x 108 m/s

Exam 22: Reflection and Refraction of Light

Light in air enters a diamond (n = 2.42)at an angle of incidence of 48.0 °\degree° .What is the angle of refraction inside the diamond?

Monochromatic light hits a piece of glass.What happens to the wavelength in the glass as the index of refraction increases?

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

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 ray of light is incident on a liquid-to-glass interface at an angle of 35 °\degree° .Indices of refraction for the liquid and glass are,respectively,1.63 and 1.52.What is the angle of refraction for the ray moving through the glass?

Light of colors 1 and 2 are sent through a prism and the rays of light of color 2 bend more.Which of the following is not true?

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

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

An optical fiber is made of clear plastic with index of refraction n = 1.50.For what angles with the surface will light remain within the plastic "guide"?

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?

According to the photon energy formula,tripling the frequency of the radiation from a monochromatic source will change the energy content of the individually radiated photons by what factor?

If the wavelength of a monochromatic source is 490 nm in vacuum,what is the wavelength from the same source when it passes through a liquid where the speed of light is 2.40 x 108 m/s? (c = 3.00 x 108 m/s)

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?

A ray of light strikes a thick sheet of glass (n = 1.5)at an angle of 25 °\degree° with the normal.Find the angle of the refracted ray within the glass with respect to the normal.

If light from a 560-nm monochromatic source in air is incident upon the surface of fused quartz (n = 1.56)at an angle of 60 °\degree° ,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 37.0 °\degree° with the normal,what is the incident angle at the oil-to-water surface?

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

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?

A ray of light travels across a liquid-to-glass interface.If the indices of refraction for the liquid and glass are,respectively,1.75 and 1.52,what is the critical angle at this interface?

A beam of light in air is incident on the surface of a rectangular block of clear plastic (n = 1.49).If the velocity of the beam before it enters the plastic is 3.00 x 108 m/s,what is its velocity inside the block?

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

Light in air enters a diamond (n = 2.42)at an angle of incidence of 48.0 $\degree$ .What is the angle of refraction inside the diamond?

A ray of light is incident on a liquid-to-glass interface at an angle of 35 $\degree$ .Indices of refraction for the liquid and glass are,respectively,1.63 and 1.52.What is the angle of refraction for the ray moving through the glass?

If the wavelength of a monochromatic source is 490 nm in vacuum,what is the wavelength from the same source when it passes through a liquid where the speed of light is 2.40 x 10⁸m/s? (c = 3.00 x 10⁸ m/s)

A ray of light strikes a thick sheet of glass (n = 1.5)at an angle of 25 $\degree$ with the normal.Find the angle of the refracted ray within the glass with respect to the normal.

If light from a 560-nm monochromatic source in air is incident upon the surface of fused quartz (n = 1.56)at an angle of 60 $\degree$ ,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 37.0 $\degree$ with the normal,what is the incident angle at the oil-to-water surface?

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?

A beam of light in air is incident on the surface of a rectangular block of clear plastic (n = 1.49).If the velocity of the beam before it enters the plastic is 3.00 x 10⁸ m/s,what is its velocity inside the block?