Question 1

A mirror has a focal length -20 cm.If an object is placed 10 cm in front of the mirror,where will the image form?

Accepted Answer

A)  20 cm in front of the mirror 
B)  20 cm behind the mirror 
C)  6.7 in from of the mirror 
D)  6.7 behind the mirror 
E)  no image will form 
A)  20 cm in front of the mirror 
B)  20 cm behind the mirror 
C)  6.7 in from of the mirror 
D)  6.7 behind the mirror 
E)  no image will form

Question 2

Which of the following best describes the greatest known value for index of refraction?

Accepted Answer

A)  1.732 
B)  1.999.... (just shy of 2) 
C)  2.000... (2 exactly) 
D)  a value greater than 2 but not greater than 3 
E)  a value greater than 3 
A)  1.732 
B)  1.999.... (just shy of 2) 
C)  2.000... (2 exactly) 
D)  a value greater than 2 but not greater than 3 
E)  a value greater than 3

Question 3

When a light ray meets an interface between two media,the angle of refraction is _______ the angle of incidence.

Accepted Answer

A)  Always less than 
B)  Always greater than 
C)  May be greater than,equal to,or less than 
D)  Equal to 
A)  Always less than 
B)  Always greater than 
C)  May be greater than,equal to,or less than 
D)  Equal to

Question 4

A thin lens of focal length 12.5 cm has a 5.0 cm tall object placed 10 cm in front of it.What is the size and orientation of the image?

Accepted Answer

A)  4.0 cm,inverted 
B)  4.0 cm,upright 
C)  8.9 cm,inverted 
D)  8.9 cm,upright 
E)  25 cm,upright 
A)  4.0 cm,inverted 
B)  4.0 cm,upright 
C)  8.9 cm,inverted 
D)  8.9 cm,upright 
E)  25 cm,upright

Question 5

An object placed at a distance closer to a converging lens than the focal point always produces an image that is

Accepted Answer

A)  The same size as the object 
B)  Smaller than the object 
C)  Virtual 
D)  Inverted 
A)  The same size as the object 
B)  Smaller than the object 
C)  Virtual 
D)  Inverted

Question 6

It is found that a laser bounced off a glass surface incident at 57 degrees produces a transmitted beam angle of 38 degrees with respect to the vertical.At what incident angle will the reflected laser beam be fully polarized?

Accepted Answer

A)  46$^{\circ}$ 
B)  36$^{\circ}$ 
C)  54$^{\circ}$ 
D)  43$^{\circ}$ 
A)  46$^{\circ}$ 
B)  36$^{\circ}$ 
C)  54$^{\circ}$ 
D)  43$^{\circ}$

Question 7

A light ray reflects from a surface.If the angle of incidence is 24$^{\circ}$,what is the angle between the reflected ray and the incident ray at the surface?

Accepted Answer

A)  24$^{\circ}$ 
B)  12$^{\circ}$ 
C)  66$^{\circ}$ 
D)  48$^{\circ}$ 
E)  102$^{\circ}$ 
A)  24$^{\circ}$ 
B)  12$^{\circ}$ 
C)  66$^{\circ}$ 
D)  48$^{\circ}$ 
E)  102$^{\circ}$

Question 8

At what angle above the horizon would the sun appear if its reflected light from a lake,viewed at the same time,were completely polarized? (n water = 1.333)

Accepted Answer

A)  53.12$^{\circ}$ 
B)  36.88$^{\circ}$ 
C)  48.75$^{\circ}$ 
D)  41.25$^{\circ}$ 
E)  23.52$^{\circ}$ 
A)  53.12$^{\circ}$ 
B)  36.88$^{\circ}$ 
C)  48.75$^{\circ}$ 
D)  41.25$^{\circ}$ 
E)  23.52$^{\circ}$

Question 9

A light ray in air strikes a glass surface with an angle of incidence of 30.0$^{\circ}$.The angle of refraction in the glass is 20.0$^{\circ}$.What is the index of refraction of the glass?

Accepted Answer

A)  1.67 
B)  1.55 
C)  1.52 
D)  1.46 
E)  1.24 
A)  1.67 
B)  1.55 
C)  1.52 
D)  1.46 
E)  1.24

Question 10

A thin lens of focal length -12.5 cm has a 5.0 cm tall object placed 10 cm in front of it.Where is the image located?

Accepted Answer

A)  2.5 cm behind the lens 
B)  5.6 cm behind the lens 
C)  5.6 cm in front of the lens 
D)  50 cm behind the lens 
E)  50 cm in front of the lens 
A)  2.5 cm behind the lens 
B)  5.6 cm behind the lens 
C)  5.6 cm in front of the lens 
D)  50 cm behind the lens 
E)  50 cm in front of the lens

Question 11

A 6.0 cm tall object is placed 20 cm in front of a convex mirror with focal -100 cm focal length.Where is the image formed?

Accepted Answer

A)  80 cm behind the mirror 
B)  25 cm behind the mirror 
C)  17 cm behind the mirror 
D)  17 cm in front of the mirror 
E)  25 cm in front of the mirror 
A)  80 cm behind the mirror 
B)  25 cm behind the mirror 
C)  17 cm behind the mirror 
D)  17 cm in front of the mirror 
E)  25 cm in front of the mirror

Question 12

When light in material 1,which is in contact with material 2,undergoes total internal reflection,what condition is necessary for their indices of refraction?

Accepted Answer

A)  n1 = 2 n2 
B)  n1 > n2 
C)  n1 2 
D)  n1 = n2 + 1 
E)  n2 = 1.5 
A)  n1 = 2 n2 
B)  n1 > n2 
C)  n1 2 
D)  n1 = n2 + 1 
E)  n2 = 1.5

Question 13

As you walk at 1.5 m/s toward a mirrored wall in a department store,how fast are approaching your image?

Accepted Answer

A)  1.5 m/s 
B)  3.0 m/s 
C)  6.0 m/s 
D)  0.75 m/s 
E)  0.0 the image stays at a constant distance 
A)  1.5 m/s 
B)  3.0 m/s 
C)  6.0 m/s 
D)  0.75 m/s 
E)  0.0 the image stays at a constant distance

Question 14

A concave mirror has a 12 cm tall object placed 40 cm in front of it.An image forms 60 cm in front of the mirror.What is the size and orientation of the image?

Accepted Answer

A)  8.0 cm,inverted 
B)  8.0 cm,upright 
C)  18 cm,inverted 
D)  18 cm,upright 
E)  24 cm,upright 
A)  8.0 cm,inverted 
B)  8.0 cm,upright 
C)  18 cm,inverted 
D)  18 cm,upright 
E)  24 cm,upright

Question 15

A light ray strikes the surface of sapphire (n = 1.77 ) at an angle of incidence of 40.0$^{\circ}$.What angle of refraction results?

Accepted Answer

A)  21.3$^{\circ}$ 
B)  50.0$^{\circ}$ 
C)  59.7$^{\circ}$ 
D)  57.0$^{\circ}$ 
E)  17.7$^{\circ}$ 
A)  21.3$^{\circ}$ 
B)  50.0$^{\circ}$ 
C)  59.7$^{\circ}$ 
D)  57.0$^{\circ}$ 
E)  17.7$^{\circ}$

Question 16

According to Huygens' principle,every point on a wave front acts as a source of a new _________ wave.

Accepted Answer

A)  transverse 
B)  spherical 
C)  longitudinal 
D)  sinusoidal 
E)  plane 
A)  transverse 
B)  spherical 
C)  longitudinal 
D)  sinusoidal 
E)  plane

Question 17

A ray of light enters an equilateral prism made of material with n = 1.45.What angle of incidence, $\theta$, will cause the internally refracted ray to be parallel to the base of the prism?

Accepted Answer

A)  46.5$^{\circ}$ 
B)  30.0$^{\circ}$ 
C)  20.2$^{\circ}$ 
D)  5.70$^{\circ}$ 
E)  this cannot happen 
A)  46.5$^{\circ}$ 
B)  30.0$^{\circ}$ 
C)  20.2$^{\circ}$ 
D)  5.70$^{\circ}$ 
E)  this cannot happen

Question 18

When projected through a single lens,the image of a movie on a screen is

Accepted Answer

A)  real and inverted. 
B)  virtual and inverted. 
C)  real and upright. 
D)  virtual and upright. 
E)  virtual and enlarged. 
A)  real and inverted. 
B)  virtual and inverted. 
C)  real and upright. 
D)  virtual and upright. 
E)  virtual and enlarged.

Question 19

When light goes from a material with a lower index of refraction n1 into a material with a higher index of refraction n2 with an angle of incidence of 30.0$^{\circ}$,which of the following is true?

Accepted Answer

A)  the angle of refraction is more than 30.0$^{\circ}$ 
B)  the angle of refraction is less than 30.0$^{\circ}$ 
C)  total internal reflection may occur 
D)  the angle of refraction is more than 30.0$^{\circ}$and total internal reflection may occur 
E)  the angle of refraction is less than 30.0$^{\circ}$and total internal reflection may occur 
A)  the angle of refraction is more than 30.0$^{\circ}$ 
B)  the angle of refraction is less than 30.0$^{\circ}$ 
C)  total internal reflection may occur 
D)  the angle of refraction is more than 30.0$^{\circ}$and total internal reflection may occur 
E)  the angle of refraction is less than 30.0$^{\circ}$and total internal reflection may occur

Question 20

A lens of focal length f is used to project an image of a solar eclipse on a flat sheet of paper.Which of the following image distances gives the clearest image in this case?

Accepted Answer

A)  f/2 
B)  f 
C)  2f 
D)  more than 10f 
E)  less than f/10 
A)  f/2 
B)  f 
C)  2f 
D)  more than 10f 
E)  less than f/10

Exam 23: Reflection and Refraction of Light

A mirror has a focal length -20 cm.If an object is placed 10 cm in front of the mirror,where will the image form?

Which of the following best describes the greatest known value for index of refraction?

When a light ray meets an interface between two media,the angle of refraction is _______ the angle of incidence.

A thin lens of focal length 12.5 cm has a 5.0 cm tall object placed 10 cm in front of it.What is the size and orientation of the image?

An object placed at a distance closer to a converging lens than the focal point always produces an image that is

It is found that a laser bounced off a glass surface incident at 57 degrees produces a transmitted beam angle of 38 degrees with respect to the vertical.At what incident angle will the reflected laser beam be fully polarized?

A light ray reflects from a surface.If the angle of incidence is 24 ∘^{\circ}∘ ,what is the angle between the reflected ray and the incident ray at the surface?

At what angle above the horizon would the sun appear if its reflected light from a lake,viewed at the same time,were completely polarized? (n water = 1.333)

A light ray in air strikes a glass surface with an angle of incidence of 30.0 ∘^{\circ}∘ .The angle of refraction in the glass is 20.0 ∘^{\circ}∘ .What is the index of refraction of the glass?

A thin lens of focal length -12.5 cm has a 5.0 cm tall object placed 10 cm in front of it.Where is the image located?

A 6.0 cm tall object is placed 20 cm in front of a convex mirror with focal -100 cm focal length.Where is the image formed?

When light in material 1,which is in contact with material 2,undergoes total internal reflection,what condition is necessary for their indices of refraction?

As you walk at 1.5 m/s toward a mirrored wall in a department store,how fast are approaching your image?

A concave mirror has a 12 cm tall object placed 40 cm in front of it.An image forms 60 cm in front of the mirror.What is the size and orientation of the image?

A light ray strikes the surface of sapphire (n = 1.77 ) at an angle of incidence of 40.0 ∘^{\circ}∘ .What angle of refraction results?

According to Huygens' principle,every point on a wave front acts as a source of a new _________ wave.

A ray of light enters an equilateral prism made of material with n = 1.45.What angle of incidence, θ\thetaθ , will cause the internally refracted ray to be parallel to the base of the prism?

When projected through a single lens,the image of a movie on a screen is

When light goes from a material with a lower index of refraction n1 into a material with a higher index of refraction n2 with an angle of incidence of 30.0 ∘^{\circ}∘ ,which of the following is true?

A lens of focal length f is used to project an image of a solar eclipse on a flat sheet of paper.Which of the following image distances gives the clearest image in this case?

Introduction

Force

Acceleration and Newtons Second Law of Motion

Motion With Constant Acceleration

Circular Motion

Conservation of Energy

Linear Momentum

Torque and Angular Momentum

Fluids

Elasticity and Oscillations

Waves

Sound

Temperature and the Ideal Gas

Heat

Thermodynamics

Electric Forces and Fields

Electric Potential

Electric Current and Circuits

Magnetic Forces and Fields

Electromagnetic Induction

Alternating Current

Electromagnetic Waves

Optical Instruments

Interference and Diffraction

Relativity

Early Quantum Physics and the Photon

Quantum Physics

Nuclear Physics

Particle Physics

Filters

A light ray reflects from a surface.If the angle of incidence is 24 $^{\circ}$ ,what is the angle between the reflected ray and the incident ray at the surface?

At what angle above the horizon would the sun appear if its reflected light from a lake,viewed at the same time,were completely polarized? (n _water = 1.333)

A light ray in air strikes a glass surface with an angle of incidence of 30.0 $^{\circ}$ .The angle of refraction in the glass is 20.0 $^{\circ}$ .What is the index of refraction of the glass?

A light ray strikes the surface of sapphire (n = 1.77 ) at an angle of incidence of 40.0 $^{\circ}$ .What angle of refraction results?

When light goes from a material with a lower index of refraction n₁ into a material with a higher index of refraction n₂ with an angle of incidence of 30.0 $^{\circ}$ ,which of the following is true?