Question 1

How large should a wall-mounted mirror be to view the upper half of one's height,h?

Accepted Answer

A)  h 
B)  h/2 
C)  h/4 
D)  The answer is not given. 
A)  h 
B)  h/2 
C)  h/4 
D)  The answer is not given.

Question 2

A woman looking in a makeup mirror sees her face at twice its actual size and right-side up.If she is 22.0 cm from the mirror,what is its focal length?

Accepted Answer

A)  44.0 cm 
B)  48.3 cm 
C)  18.6 cm 
D)  56.0 cm 
A)  44.0 cm 
B)  48.3 cm 
C)  18.6 cm 
D)  56.0 cm

Question 3

An object is 12.0 cm from the surface of a spherical Christmas tree ornament that is 10.0 cm in diameter.What is the magnification of the image?

Accepted Answer

A)  −0.500 
B)  −0.200 
C)  +0.172 
D)  +0.143 
A)  −0.500 
B)  −0.200 
C)  +0.172 
D)  +0.143

Question 4

A light ray passes from air through a thin plastic slab (n = 1.3)with parallel sides.If the ray in air makes an angle of 67° 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)  33° 
B)  67° 
C)  58.5° 
D)  45° 
A)  33° 
B)  67° 
C)  58.5° 
D)  45°

Question 5

You stand three feet away from a plane mirror.How far is it from you to your image?

Accepted Answer

A)  4.0 ft 
B)  6.0 ft 
C)  2.0 ft 
D)  3.0 ft 
A)  4.0 ft 
B)  6.0 ft 
C)  2.0 ft 
D)  3.0 ft

Question 6

A light ray in air is incident on an air-to-glass boundary at an angle of 30.0° and is refracted in the glass at an angle of 16.7° with the normal.Find the index of refraction of the glass.

Accepted Answer

A)  1.74 
B)  1.40 
C)  1.23 
D)  2.13 
A)  1.74 
B)  1.40 
C)  1.23 
D)  2.13

Question 7

An object is held at a distance of 18 cm from a convex mirror creating an image that is 1/6 the object size.What is the focal length of the mirror?

Accepted Answer

A)  −3.6 cm 
B)  −18 cm 
C)  −6.0 cm 
D)  −9.0 cm 
A)  −3.6 cm 
B)  −18 cm 
C)  −6.0 cm 
D)  −9.0 cm

Question 8

Ansel places an object 30 cm from a thin,convex lens along the axis.If a real image forms at a distance of 15 cm from the lens,what is the focal length of the lens?

Accepted Answer

A)  15 cm 
B)  10 cm 
C)  7.5 cm 
D)  30 cm 
A)  15 cm 
B)  10 cm 
C)  7.5 cm 
D)  30 cm

Question 9

In glass,which of the following colors of light travels fastest?

Accepted Answer

A)  red 
B)  blue 
C)  yellow 
D)  All three of the above travel at the same speed. 
A)  red 
B)  blue 
C)  yellow 
D)  All three of the above travel at the same speed.

Question 10

An object is placed 10 cm in front of a mirror,and an image is formed that has a magnification of 3.Which of the following statements is false?

Accepted Answer

A)  The image is upright. 
B)  The image is virtual. 
C)  The focal length of the mirror is 15 cm. 
D)  This is the only true statement. 
A)  The image is upright. 
B)  The image is virtual. 
C)  The focal length of the mirror is 15 cm. 
D)  This is the only true statement.

Question 11

Which of the following best describes the image from a plane mirror?

Accepted Answer

A)  virtual and magnification equal to one 
B)  real and magnification equal to one 
C)  real and magnification less than one 
D)  virtual and magnification greater than one 
A)  virtual and magnification equal to one 
B)  real and magnification equal to one 
C)  real and magnification less than one 
D)  virtual and magnification greater than one

Question 12

A ray of light is incident on the mid-point of a glass prism surface at an angle of 20° with the normal.For the glass,n = 1.60,and the prism apex angle is 40°.What is the angle of incidence at the glass-to-air surface on the side opposite where the ray exits the prism? The surfaces involved are those of the apex angle.

Accepted Answer

A)  12.3° 
B)  38.0° 
C)  22.7° 
D)  27.7° 
A)  12.3° 
B)  38.0° 
C)  22.7° 
D)  27.7°

Question 13

An object placed 12 cm from a concave mirror produces a real image 8.0 cm from the mirror.If the object is now moved to a new position 15.0 cm from the mirror,where is the new image located as measured from the mirror?

Accepted Answer

A)  6.5 cm 
B)  14.6 cm 
C)  7.1 cm 
D)  3.0 cm 
A)  6.5 cm 
B)  14.6 cm 
C)  7.1 cm 
D)  3.0 cm

Question 14

The real image of an object is located 35.0 cm away from a concave mirror,which has a focal length of 10.0 cm.How far is the object from the mirror?

Accepted Answer

A)  40.0 cm 
B)  35.0 cm 
C)  14.0 cm 
D)  12.9 cm 
A)  40.0 cm 
B)  35.0 cm 
C)  14.0 cm 
D)  12.9 cm

Question 15

If the speed of light through an unknown liquid is measured at 1.67 × 108 m/s,what is the index of refraction of this liquid? (c = 3.00 × 108 m/s)

Accepted Answer

A)  1.80 
B)  1.67 
C)  0.600 
D)  1.20 
A)  1.80 
B)  1.67 
C)  0.600 
D)  1.20

Question 16

A small underwater pool light is 1.26 m below the surface of a swimming pool.What is the radius of the circle of light on the surface,from which light emerges from the water? (nwater = 1.333).

Accepted Answer

A)  0.77 m 
B)  0.57 m 
C)  1.13 m 
D)  1.43 m 
A)  0.77 m 
B)  0.57 m 
C)  1.13 m 
D)  1.43 m

Question 17

Sally places an object 6.0 cm from a thin,convex lens along its axis.The lens has a focal length of 12 cm.What are the respective values of the image distance and magnification?

Accepted Answer

A)  12 cm and −2.0 
B)  -12 cm and 2.0 
C)  3.0 cm and −0.50 
D)  −6.0 cm and −1.0 
A)  12 cm and −2.0 
B)  -12 cm and 2.0 
C)  3.0 cm and −0.50 
D)  −6.0 cm and −1.0

Question 18

When the reflection of an object is seen in a plane mirror,the distance from the mirror to the image depends on:

Accepted Answer

A)  the distance from the object to the mirror. 
B)  the size of the object. 
C)  the distance of both the observer and the object to the mirror. 
D)  the wavelength of light used for viewing. 
A)  the distance from the object to the mirror. 
B)  the size of the object. 
C)  the distance of both the observer and the object to the mirror. 
D)  the wavelength of light used for viewing.

Question 19

A material has an index of refraction of 1.92 for light from a 560 nm source.What is the speed of light for this wavelength within the material? (c = 3.00 × 108 m/s)

Accepted Answer

A)  2.19 × 108 m/s 
B)  4.68 × 108 m/s 
C)  1.56 × 108 m/s 
D)  1.92 × 108 m/s 
A)  2.19 × 108 m/s 
B)  4.68 × 108 m/s 
C)  1.56 × 108 m/s 
D)  1.92 × 108 m/s

Question 20

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 70°,what is the wavelength of the ray refracted within the quartz?

Accepted Answer

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

Exam 24: Wave Optics: Part A

How large should a wall-mounted mirror be to view the upper half of one's height,h?

A woman looking in a makeup mirror sees her face at twice its actual size and right-side up.If she is 22.0 cm from the mirror,what is its focal length?

An object is 12.0 cm from the surface of a spherical Christmas tree ornament that is 10.0 cm in diameter.What is the magnification of the image?

A light ray passes from air through a thin plastic slab (n = 1.3)with parallel sides.If the ray in air makes an angle of 67° 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?

You stand three feet away from a plane mirror.How far is it from you to your image?

A light ray in air is incident on an air-to-glass boundary at an angle of 30.0° and is refracted in the glass at an angle of 16.7° with the normal.Find the index of refraction of the glass.

An object is held at a distance of 18 cm from a convex mirror creating an image that is 1/6 the object size.What is the focal length of the mirror?

Ansel places an object 30 cm from a thin,convex lens along the axis.If a real image forms at a distance of 15 cm from the lens,what is the focal length of the lens?

In glass,which of the following colors of light travels fastest?

An object is placed 10 cm in front of a mirror,and an image is formed that has a magnification of 3.Which of the following statements is false?

Which of the following best describes the image from a plane mirror?

An object placed 12 cm from a concave mirror produces a real image 8.0 cm from the mirror.If the object is now moved to a new position 15.0 cm from the mirror,where is the new image located as measured from the mirror?

The real image of an object is located 35.0 cm away from a concave mirror,which has a focal length of 10.0 cm.How far is the object from the mirror?

If the speed of light through an unknown liquid is measured at 1.67 × 108 m/s,what is the index of refraction of this liquid? (c = 3.00 × 108 m/s)

A small underwater pool light is 1.26 m below the surface of a swimming pool.What is the radius of the circle of light on the surface,from which light emerges from the water? (nwater = 1.333).

Sally places an object 6.0 cm from a thin,convex lens along its axis.The lens has a focal length of 12 cm.What are the respective values of the image distance and magnification?

When the reflection of an object is seen in a plane mirror,the distance from the mirror to the image depends on:

A material has an index of refraction of 1.92 for light from a 560 nm source.What is the speed of light for this wavelength within the material? (c = 3.00 × 108 m/s)

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 70°,what is the wavelength of the ray refracted within the quartz?

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

Reflection and Refraction of Light: Part A

Mirrors and Lenses

Mirrors and Lenses: Part A

Wave Optics

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

Particle Collisions, Mediating Photons, and Quark Structures: Exploring the Fundamentals of Physics

If the speed of light through an unknown liquid is measured at 1.67 × 10⁸ m/s,what is the index of refraction of this liquid? (c = 3.00 × 10⁸ m/s)

A small underwater pool light is 1.26 m below the surface of a swimming pool.What is the radius of the circle of light on the surface,from which light emerges from the water? (n_water = 1.333).

A material has an index of refraction of 1.92 for light from a 560 nm source.What is the speed of light for this wavelength within the material? (c = 3.00 × 10⁸ m/s)