Question 1

At a quiet pond with crystal clear water, you decide to fish with bow and arrow. When you aim at the fish you see, you must aim

Accepted Answer

A) closer to the surface then you perceive the fish to be. 
B) directly at the fish. 
C) deeper then you perceive the fish to be. 
D) It depends on how large the fish is. 
E) It depends on how deep the pond is. 
A) closer to the surface then you perceive the fish to be. 
B) directly at the fish. 
C) deeper then you perceive the fish to be. 
D) It depends on how large the fish is. 
E) It depends on how deep the pond is. C

Question 2

An object at the center of curvature of a concave mirror forms an inverted image at the center of curvature itself.

Accepted Answer

A) True 
 B)False  True

Question 3

If a length of lucite that is being used as a light pipe gets wet, the critical angle

Accepted Answer

A) decreases. 
B) is unaffected. 
C) doubles. 
D) is meaningless since lucite cannot be used as a light pipe. 
E) increases. 
A) decreases. 
B) is unaffected. 
C) doubles. 
D) is meaningless since lucite cannot be used as a light pipe. 
E) increases. A

Question 4

Light consisting of a mixture of red and blue light enters a 40°, 70°, 70° prism along a line parallel to the side opposite the 40° vertex. The index of refraction of the prism material for blue light is 1.530, and for red light it is 1.525. What is the angle between the two emerging beams of light?

Accepted Answer

A) 0.5° 
B) 0.9° 
C) 0.1° 
D) 0.3° 
E) 0.7° 
A) 0.5° 
B) 0.9° 
C) 0.1° 
D) 0.3° 
E) 0.7°

Question 5

An object 4.0 cm in height is placed 8.0 cm in front of a concave mirror with a focal length of 10.0 cm. What is the position of its image in relation to the mirror and what are its characteristics?

Accepted Answer

A) 40.0 cm on the other side of mirror, real, 6.0 times bigger 
B) 10.0 cm on the other side of mirror, virtual, 10.0 times bigger 
C) 18.0 cm on the same side of mirror, virtual, 2.25 times bigger 
D) 10.0 cm on the same side of mirror, real, 6.0 times bigger 
E) 40.0 cm on the other side of mirror, virtual, 5.0 times bigger 
A) 40.0 cm on the other side of mirror, real, 6.0 times bigger 
B) 10.0 cm on the other side of mirror, virtual, 10.0 times bigger 
C) 18.0 cm on the same side of mirror, virtual, 2.25 times bigger 
D) 10.0 cm on the same side of mirror, real, 6.0 times bigger 
E) 40.0 cm on the other side of mirror, virtual, 5.0 times bigger

Question 6

A concave mirror has

Accepted Answer

A) no focal length. 
B) a positive or negative focal length depending on the object position. 
C) a positive focal length. 
D) a negative focal length. 
E) a positive or negative focal length depending on the object size. 
A) no focal length. 
B) a positive or negative focal length depending on the object position. 
C) a positive focal length. 
D) a negative focal length. 
E) a positive or negative focal length depending on the object size.

Question 7

After striking a concave mirror, a paraxial beam of light passes through the mirror's focal point.

Accepted Answer

A) True 
 B)False

Question 8

If the absolute value of the magnification is larger than one, then the image is

Accepted Answer

A) larger than the object. 
B) the same size as the object. 
C) smaller than the object. 
A) larger than the object. 
B) the same size as the object. 
C) smaller than the object.

Question 9

A convex mirror always produces a virtual image smaller than the object.

Accepted Answer

A) True 
 B)False

Question 10

If you stand in front of a convex mirror, at the same distance from it as its radius of curvature,

Accepted Answer

A) you won't see your image because there is none. 
B) you won't see your image because it's focused at a different distance. 
C) you will see your image and you will appear smaller. 
D) you will see your image and you will appear larger. 
E) you will see your image at your same height. 
A) you won't see your image because there is none. 
B) you won't see your image because it's focused at a different distance. 
C) you will see your image and you will appear smaller. 
D) you will see your image and you will appear larger. 
E) you will see your image at your same height.

Question 11

Magnification is positive for inverted images.

Accepted Answer

A) True 
 B)False

Question 12

An object is placed in front of a convex mirror at a distance larger than twice the focal length of the mirror. The image will appear

Accepted Answer

A) in front of the mirror. 
B) inverted and reduced. 
C) inverted and enlarged. 
D) upright and reduced. 
E) upright and enlarged. 
A) in front of the mirror. 
B) inverted and reduced. 
C) inverted and enlarged. 
D) upright and reduced. 
E) upright and enlarged.

Question 13

The angle of incidence

Accepted Answer

A) must equal the angle of refraction. 
B) is always less than the angle of refraction. 
C) is always greater than the angle of refraction. 
D) may be greater than, less than, or equal to the angle of refraction. 
A) must equal the angle of refraction. 
B) is always less than the angle of refraction. 
C) is always greater than the angle of refraction. 
D) may be greater than, less than, or equal to the angle of refraction.

Question 14

A mirror with a focal length 100 cm has a 4.0 cm object placed 20 cm in front of it. What is the height of the image?

Accepted Answer

A) -3.2 cm 
B) 3.2 cm 
C) 5.0 cm 
D) -5.0 cm 
E) 4.0 cm 
A) -3.2 cm 
B) 3.2 cm 
C) 5.0 cm 
D) -5.0 cm 
E) 4.0 cm

Question 15

Light enters a substance from air at an angle of 32.0°, and continues at an angle of 23.0°. What is the index of refraction of the substance?

Accepted Answer

A) 0.74 
B) 1.11 
C) 1.28 
D) 1.36 
E) 1.52 
A) 0.74 
B) 1.11 
C) 1.28 
D) 1.36 
E) 1.52

Question 16

In a concave mirror the inside of the spherical surface is the reflecting surface.

Accepted Answer

A) True 
 B)False

Question 17

A beam of light in air enters a glass slab with an index of refraction of 1.40 at an angle of incidence of 30.0°. What is the angle of refraction?

Accepted Answer

A) 20.9° 
B) 47.5° 
C) 51.8° 
D) 30.0° 
E) 14.9° 
A) 20.9° 
B) 47.5° 
C) 51.8° 
D) 30.0° 
E) 14.9°

Question 18

An optical fiber made of glass with an index of refraction 1.50 that is coated with a material with index of refraction 1.30 has a critical angle of

Accepted Answer

A) 90°. 
B) 41.8°. 
C) 60.0°. 
D) 50.2°. 
E) This combination will not work. 
A) 90°. 
B) 41.8°. 
C) 60.0°. 
D) 50.2°. 
E) This combination will not work.

Question 19

What is the critical angle for light traveling from crown glass (n = 1.52) into water (n = 1.33)?

Accepted Answer

A) 42° 
B) 48° 
C) 53° 
D) 57° 
E) 61° 
A) 42° 
B) 48° 
C) 53° 
D) 57° 
E) 61°

Question 20

A magnifier used for reading small print is shaped like a hemisphere 2.0 cm in radius, placed on top of a cylinder of the same radius and 2.0 cm tall. The flat side of the magnifier is placed directly over the print on a book. Where does the image of the print appear to be? (The index of refraction of the magnifier is 1.52.)

Accepted Answer

A) 30.4 cm above the top of the magnifier 
B) 12.7 cm above the top of the magnifier 
C) 32.1 cm below the top of the magnifier 
D) 12.5 cm below the top of the magnifier 
E) at the center of the hemisphere 
A) 30.4 cm above the top of the magnifier 
B) 12.7 cm above the top of the magnifier 
C) 32.1 cm below the top of the magnifier 
D) 12.5 cm below the top of the magnifier 
E) at the center of the hemisphere

Exam 32: Light: Reflection and Refraction

At a quiet pond with crystal clear water, you decide to fish with bow and arrow. When you aim at the fish you see, you must aim

An object at the center of curvature of a concave mirror forms an inverted image at the center of curvature itself.

If a length of lucite that is being used as a light pipe gets wet, the critical angle

An object 4.0 cm in height is placed 8.0 cm in front of a concave mirror with a focal length of 10.0 cm. What is the position of its image in relation to the mirror and what are its characteristics?

A concave mirror has

After striking a concave mirror, a paraxial beam of light passes through the mirror's focal point.

If the absolute value of the magnification is larger than one, then the image is

A convex mirror always produces a virtual image smaller than the object.

If you stand in front of a convex mirror, at the same distance from it as its radius of curvature,

Magnification is positive for inverted images.

An object is placed in front of a convex mirror at a distance larger than twice the focal length of the mirror. The image will appear

The angle of incidence

A mirror with a focal length 100 cm has a 4.0 cm object placed 20 cm in front of it. What is the height of the image?

Light enters a substance from air at an angle of 32.0°, and continues at an angle of 23.0°. What is the index of refraction of the substance?

In a concave mirror the inside of the spherical surface is the reflecting surface.

A beam of light in air enters a glass slab with an index of refraction of 1.40 at an angle of incidence of 30.0°. What is the angle of refraction?

An optical fiber made of glass with an index of refraction 1.50 that is coated with a material with index of refraction 1.30 has a critical angle of

What is the critical angle for light traveling from crown glass (n = 1.52) into water (n = 1.33)?

Introduction, Measurement, Estimating

Describing Motion: Kinematics in One Dimension

Kinematics in Two or Three Dimensions; Vectors

Dynamics: Newtons Laws of Motion

Using Newtons Laws: Friction, Circular Motion, Drag Forces

Gravitation and Newtons6 Synthesis

Work and Energy

Conservation of Energy

Linear Momentum

Rotational Motion

Angular Momentum; General Rotation

Static Equilibrium; Elasticity and Fracture

Fluids

Oscillations

Wave Motion

Sound

Temperature, Thermal Expansion, and the Ideal Gas Law

Kinetic Theory of Gases

Heat and the First Law of Thermodynamics

Second Law of Thermodynamics

Electric Charge and Electric Field

Gausss Law

Electric Potential

Capacitance, Dielectrics, Electric Energy Storage

Electric Currents and Resistance

Dc Circuits

Magnetism

Sources of Magnetic Field

Electromagnetic Induction and Faradays Law

Inductance, Electromagnetic Oscillations, and Ac Circuits

Maxwells Equations and Electromagnetic Waves

Lenses and Optical Instruments

The Wave Nature of Light; Interference

Diffraction and Polarization

Special Theory of Relativity

Early Quantum Theory and Models of the Atom

Quantum Mechanics

Quantum Mechanics of Atoms

Molecules and Solids

Nuclear Physics and Radioactivity

Nuclear Energy: Efects and Uses of Radiation

Elementary Particle

Astrophysics and Cosmology

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