Question 1

A beam of light in air is incident on a glass slab at an angle of incidence θi < 90°. After entering the glass slab, the beam of light

Accepted Answer

A) does not change its path. 
B) follows the normal to the glass slab. 
C) bends away from the normal drawn at the point of contact. 
D) bends closer to the normal drawn at the point of contact. 
A) does not change its path. 
B) follows the normal to the glass slab. 
C) bends away from the normal drawn at the point of contact. 
D) bends closer to the normal drawn at the point of contact.

Question 2

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

Accepted Answer

A) 25 cm behind the mirror 
B) 20 cm behind the mirror 
C) 20 cm in front of the mirror 
D) 25 cm in front of the mirror 
E) 100 cm in front of the mirror 
A) 25 cm behind the mirror 
B) 20 cm behind the mirror 
C) 20 cm in front of the mirror 
D) 25 cm in front of the mirror 
E) 100 cm in front of the mirror

Question 3

A convex 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 4

A goldfish bowl is spherical, 8 cm in radius. A goldfish is swimming 3.0 cm from the wall of the bowl. Where does the fish appear to be to an observer outside? The index of refraction of water is 1.33. Neglect the effect of the glass wall of the bowl.

Accepted Answer

A) 3.3 cm inside the bowl 
B) 3.9 cm inside the bowl 
C) 3.6 cm inside the bowl 
D) 3.0 cm inside the bowl 
E) 1.7 cm inside the bowl 
A) 3.3 cm inside the bowl 
B) 3.9 cm inside the bowl 
C) 3.6 cm inside the bowl 
D) 3.0 cm inside the bowl 
E) 1.7 cm inside the bowl

Question 5

The spreading of white light into its spectrum is called

Accepted Answer

A) refraction. 
B) dispersion. 
C) reflection. 
D) demodulation. 
E) rainbowing. 
A) refraction. 
B) dispersion. 
C) reflection. 
D) demodulation. 
E) rainbowing.

Question 6

An oil layer that is 5.0 cm thick is spread smoothly and evenly over the surface of water on a windless day. What is the angle of refraction in the water for a ray of light that has an angle of incidence of 45° as it enters the oil from the air above? (The index of refraction for oil is 1.15, and for water it is 1.33.)

Accepted Answer

A) 27° 
B) 32° 
C) 36° 
D) 39° 
E) 52° 
A) 27° 
B) 32° 
C) 36° 
D) 39° 
E) 52°

Question 7

If you stand in front of a concave mirror, exactly at its focal point,

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 8

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

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 9

When a beam of light in air is incident at an angle of incidence θi < 90° on a piece of glass, the angle of refraction is larger than the angle of incidence.

Accepted Answer

A) True 
 B)False

Question 10

At what angle from the vertical must a fish underwater look in order to see a fisherman at the shore? (Note: n for water is 1.33.)

Accepted Answer

A) 41.2° 
B) 48.8° 
C) 60.0° 
D) 36.9° 
E) 90.0° 
A) 41.2° 
B) 48.8° 
C) 60.0° 
D) 36.9° 
E) 90.0°

Question 11

Reflection, refraction, and the formation of images by mirrors and lenses has been successful described by the

Accepted Answer

A) wave model of light. 
B) ray model of light. 
C) particle model of light. 
D) electro model of light. 
E) none of the given answers 
A) wave model of light. 
B) ray model of light. 
C) particle model of light. 
D) electro model of light. 
E) none of the given answers

Question 12

How tall must a plane mirror be in order for you to be able to see your full image in it?

Accepted Answer

A) the same height as you 
B) 1/4 of your height 
C) half of your height 
D) 3/4 of your height 
E) twice your height 
A) the same height as you 
B) 1/4 of your height 
C) half of your height 
D) 3/4 of your height 
E) twice your height

Question 13

An object is located 3.8 m in front of a plane mirror. The image formed by the mirror appears to be

Accepted Answer

A) 1.9 m in front of the mirror. 
B) on the mirror's surface. 
C) 1.9 m behind the mirror's surface. 
D) 3.8 m in front of the mirror. 
E) 3.8 m behind the mirror's surface. 
A) 1.9 m in front of the mirror. 
B) on the mirror's surface. 
C) 1.9 m behind the mirror's surface. 
D) 3.8 m in front of the mirror. 
E) 3.8 m behind the mirror's surface.

Question 14

Convex spherical mirrors produce images which

Accepted Answer

A) are always smaller than the actual object. 
B) are always larger than the actual object. 
C) are always the same size as the actual object. 
D) could be larger than or the same size as the actual object, depending on the placement of the object. 
E) could be smaller than or the same size as the actual object, depending on the placement of the object. 
A) are always smaller than the actual object. 
B) are always larger than the actual object. 
C) are always the same size as the actual object. 
D) could be larger than or the same size as the actual object, depending on the placement of the object. 
E) could be smaller than or the same size as the actual object, depending on the placement of the object.

Question 15

A light ray in air enters water at an angle of incidence of 40°. Water has an index of refraction of 1.33. The angle of refraction in the water is

Accepted Answer

A) 59°. 
B) 29°. 
C) 40°. 
D) 0.59°. 
E) 1.33°. 
A) 59°. 
B) 29°. 
C) 40°. 
D) 0.59°. 
E) 1.33°.

Question 16

Light strikes a 5.0 cm thick sheet of glass with index of refraction 1.50 at an angle of incidence in air of 50°. (a) What is the angle of refraction in the glass?
(b) After traveling through the glass the light re-emerges into the air. What is the final angle of refraction in air?
(c) Determine the amount its path is displaced when it leaves the glass from what it had been before entering the glass.

Accepted Answer

(a) 31°
(b

Question 17

A concave mirror always produces a real image of an object placed in front of it.

Accepted Answer

A) True 
 B)False

Question 18

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

Accepted Answer

A) 1.0 cm 
B) 1.6 cm 
C) -16 cm 
D) -1.0 cm 
E) 16 cm 
A) 1.0 cm 
B) 1.6 cm 
C) -16 cm 
D) -1.0 cm 
E) 16 cm

Question 19

When light passes through a prism the color refracted most is

Accepted Answer

A) green. 
B) red. 
C) violet. 
D) blue. 
E) yellow. 
A) green. 
B) red. 
C) violet. 
D) blue. 
E) yellow.

Question 20

State how to draw the three rays for finding the image position due to a curved mirror.

Accepted Answer

Ray 1 leaves the top of the object and i

Exam 32: Light: Reflection and Refraction

A beam of light in air is incident on a glass slab at an angle of incidence θi < 90°. After entering the glass slab, the beam of light

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

A convex mirror has

A goldfish bowl is spherical, 8 cm in radius. A goldfish is swimming 3.0 cm from the wall of the bowl. Where does the fish appear to be to an observer outside? The index of refraction of water is 1.33. Neglect the effect of the glass wall of the bowl.

The spreading of white light into its spectrum is called

If you stand in front of a concave mirror, exactly at its focal point,

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

When a beam of light in air is incident at an angle of incidence θi < 90° on a piece of glass, the angle of refraction is larger than the angle of incidence.

At what angle from the vertical must a fish underwater look in order to see a fisherman at the shore? (Note: n for water is 1.33.)

Reflection, refraction, and the formation of images by mirrors and lenses has been successful described by the

How tall must a plane mirror be in order for you to be able to see your full image in it?

An object is located 3.8 m in front of a plane mirror. The image formed by the mirror appears to be

Convex spherical mirrors produce images which

A light ray in air enters water at an angle of incidence of 40°. Water has an index of refraction of 1.33. The angle of refraction in the water is

A concave mirror always produces a real image of an object placed in front of it.

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

When light passes through a prism the color refracted most is

State how to draw the three rays for finding the image position due to a curved mirror.

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

Filters

A beam of light in air is incident on a glass slab at an angle of incidence θ_i < 90°. After entering the glass slab, the beam of light

When a beam of light in air is incident at an angle of incidence θ_i < 90° on a piece of glass, the angle of refraction is larger than the angle of incidence.