Question 1

A 5.0-ft woman wishes to see a full length image of herself in a plane mirror.The minimum length mirror required is:

Accepted Answer

A) 2.5 ft 
B) 3.54 ft 
C) 5.0 ft 
D) 10 ft 
E) no single answer: the farther away she stands the smaller the required mirror length 
A) 2.5 ft 
B) 3.54 ft 
C) 5.0 ft 
D) 10 ft 
E) no single answer: the farther away she stands the smaller the required mirror length

Question 2

An object is 30 cm in front of a converging lens of focal length 10 cm.The image is:

Accepted Answer

A) real and larger than the object 
B) real and the same size than the object 
C) real and smaller than the object 
D) virtual and the same size than the object 
E) virtual and smaller than the object 
A) real and larger than the object 
B) real and the same size than the object 
C) real and smaller than the object 
D) virtual and the same size than the object 
E) virtual and smaller than the object

Question 3

An object is in front of a converging lens, at a distance less than the focal length from the lens.Its image is:

Accepted Answer

A) virtual and larger than the object 
B) real and smaller than the object 
C) virtual and smaller than the object 
D) real and larger than the object 
E) virtual and the same size as the object 
A) virtual and larger than the object 
B) real and smaller than the object 
C) virtual and smaller than the object 
D) real and larger than the object 
E) virtual and the same size as the object

Question 4

A concave spherical mirror has a focal length of 12 cm.If an object is placed 18 cm in front of it the image position is:

Accepted Answer

A) 7.2 cm behind the mirror 
B) 7.2 cm in front of the mirror 
C) 36 cm behind the mirror 
D) 36 cm in front of the mirror 
E) at infinity 
A) 7.2 cm behind the mirror 
B) 7.2 cm in front of the mirror 
C) 36 cm behind the mirror 
D) 36 cm in front of the mirror 
E) at infinity

Question 5

A hollow lens is made of thin glass as shown.It can be filled with air, water (n = 1.3)or CS2 (carbon disulfide, n = 1.6).A beam of parallel light entering the lens will diverge if the lens is filled with:

Accepted Answer

A) air and immersed in air 
B) air and immersed in water 
C) water and immersed in CS2 
D) CS2 and immersed in water 
E) CS2 and immersed in CS2 
A) air and immersed in air 
B) air and immersed in water 
C) water and immersed in CS2 
D) CS2 and immersed in water 
E) CS2 and immersed in CS2

Question 6

A converging lens is symmetric; its curved sides have radii of 50 cm.If the focal length is to be 80 cm, what should the index of refraction be?

Accepted Answer

A) 0 
B) 0.3 
C) 0.6 
D) 1.3 
E) 1.6 
A) 0 
B) 0.3 
C) 0.6 
D) 1.3 
E) 1.6

Question 7

A card marked IAHIO8 is standing upright in front of a plane mirror.Which of the following is NOT true?

Accepted Answer

A) The image is virtual 
B) The image shifts its position as the observer shifts his position 
C) The image appears as 8OIHAI to a person looking in the mirror 
D) The image is caused mostly by specular rather than diffuse reflection 
E) The image is the same size as the object 
A) The image is virtual 
B) The image shifts its position as the observer shifts his position 
C) The image appears as 8OIHAI to a person looking in the mirror 
D) The image is caused mostly by specular rather than diffuse reflection 
E) The image is the same size as the object

Question 8

Where must an object be placed in front of a converging lens in order to obtain a virtual image?

Accepted Answer

A) At the focal point 
B) At twice the distance to the focal point 
C) Anywhere beyond the focal point 
D) Between the focal point and the lens 
E) Between the focal point and twice the distance to the focal point 
A) At the focal point 
B) At twice the distance to the focal point 
C) Anywhere beyond the focal point 
D) Between the focal point and the lens 
E) Between the focal point and twice the distance to the focal point

Question 9

A concave refracting surface is one with a center of curvature:

Accepted Answer

A) to the left of the surface 
B) to the right of the surface 
C) on the side of the incident light 
D) on the side of the refracted light 
E) on the side with the higher index of refraction 
A) to the left of the surface 
B) to the right of the surface 
C) on the side of the incident light 
D) on the side of the refracted light 
E) on the side with the higher index of refraction

Question 10

A man holds a rectangular card in front of and parallel to a plane mirror.In order for him to see the entire image of the card, the least mirror area needed is:

Accepted Answer

A) that of the whole mirror, regardless of its size 
B) that of the pupil of his eye 
C) one-half that of the card 
D) one-fourth that of the card 
E) an amount which decreases with his distance from the mirror 
A) that of the whole mirror, regardless of its size 
B) that of the pupil of his eye 
C) one-half that of the card 
D) one-fourth that of the card 
E) an amount which decreases with his distance from the mirror

Question 11

At what distance in front of a concave mirror must an object be placed so that the image and object are the same size?

Accepted Answer

A) one focal length 
B) half the focal length 
C) twice the focal length 
D) less than half the focal length 
E) more than twice the focal length 
A) one focal length 
B) half the focal length 
C) twice the focal length 
D) less than half the focal length 
E) more than twice the focal length

Question 12

An object is 20 cm to the left of a lens of focal length +10 cm.A second lens, of focal length +12.5 cm, is 30 cm to the right of the first lens.The distance between the original object and the final image is:

Accepted Answer

A) 0 cm 
B) 28 cm 
C) 50 cm 
D) 100 cm 
E) infinite 
A) 0 cm 
B) 28 cm 
C) 50 cm 
D) 100 cm 
E) infinite

Question 13

When you stand in front of a plane mirror, your image is:

Accepted Answer

A) real, erect, and smaller than you 
B) real, erect, and the same size as you 
C) virtual, erect, and smaller than you 
D) virtual, erect, and the same size as you 
E) real, inverted, and the same size as you 
A) real, erect, and smaller than you 
B) real, erect, and the same size as you 
C) virtual, erect, and smaller than you 
D) virtual, erect, and the same size as you 
E) real, inverted, and the same size as you

Question 14

The objective lens of the Yerkes telescope (the largest functioning refracting telescope in the world)has a focal length of 19.4 m.If its eyepiece has a focal length of 2.5 cm, what is the magnitude of its magnification?

Accepted Answer

A) 7.8 
B) 13 
C) 130 
D) 780 
E) cannot be calculated without knowing the length of the telescope 
A) 7.8 
B) 13 
C) 130 
D) 780 
E) cannot be calculated without knowing the length of the telescope

Question 15

A converging lens of focal length 20 cm is placed in contact with, and to the left of, a diverging lens of focal length 30 cm.If an object is placed 40 cm to the left of the converging lens, the total magnification is:

Accepted Answer

A) -3.0 
B) -1.5 
C) -1.0 
D) 2.0 
E) 3.0 
A) -3.0 
B) -1.5 
C) -1.0 
D) 2.0 
E) 3.0

Question 16

The term "virtual" as applied to an image made by a mirror means that the image:

Accepted Answer

A) is on the mirror surface 
B) cannot be photographed by a camera 
C) is in front of the mirror 
D) is the same size as the object 
E) cannot be shown directly on a screen 
A) is on the mirror surface 
B) cannot be photographed by a camera 
C) is in front of the mirror 
D) is the same size as the object 
E) cannot be shown directly on a screen

Question 17

Consider the following four statements concerning a compound microscope:   Which two of the four statements are correct?

Accepted Answer

A) I, II 
B) I, III 
C) I, IV 
D) II, III 
E) II, IV 
A) I, II 
B) I, III 
C) I, IV 
D) II, III 
E) II, IV

Question 18

In a two lens microscope, the intermediate image is:

Accepted Answer

A) virtual, erect and magnified 
B) real, erect and magnified 
C) real, inverted and magnified 
D) virtual, inverted and reduced 
E) virtual, inverted and magnified 
A) virtual, erect and magnified 
B) real, erect and magnified 
C) real, inverted and magnified 
D) virtual, inverted and reduced 
E) virtual, inverted and magnified

Question 19

Let fo and fe be the focal lengths of the objective and eyepiece of a compound microscope.In ordinary use, the object:

Accepted Answer

A) is less than fo from the objective lens 
B) is more that fo from the objective 
C) produces an intermediate image which is slightly more than fe from the eyepiece 
D) produces an intermediate image which is 2fe away from the eyepiece 
E) produces an intermediate image which is less than fo from the objective 
A) is less than fo from the objective lens 
B) is more that fo from the objective 
C) produces an intermediate image which is slightly more than fe from the eyepiece 
D) produces an intermediate image which is 2fe away from the eyepiece 
E) produces an intermediate image which is less than fo from the objective

Question 20

A magnifying glass has a focal length of 15 cm.If the near point of the eye is 25 cm from the eye the angular magnification of the glass is about:

Accepted Answer

A) 0.067 
B) 0.33 
C) 0.5 
D) 0.67 
E) 1.7 
A) 0.067 
B) 0.33 
C) 0.5 
D) 0.67 
E) 1.7

Exam 34: Images

A 5.0-ft woman wishes to see a full length image of herself in a plane mirror.The minimum length mirror required is:

An object is 30 cm in front of a converging lens of focal length 10 cm.The image is:

An object is in front of a converging lens, at a distance less than the focal length from the lens.Its image is:

A concave spherical mirror has a focal length of 12 cm.If an object is placed 18 cm in front of it the image position is:

A hollow lens is made of thin glass as shown.It can be filled with air, water (n = 1.3)or CS2 (carbon disulfide, n = 1.6).A beam of parallel light entering the lens will diverge if the lens is filled with:

A converging lens is symmetric; its curved sides have radii of 50 cm.If the focal length is to be 80 cm, what should the index of refraction be?

A card marked IAHIO8 is standing upright in front of a plane mirror.Which of the following is NOT true?

Where must an object be placed in front of a converging lens in order to obtain a virtual image?

A concave refracting surface is one with a center of curvature:

A man holds a rectangular card in front of and parallel to a plane mirror.In order for him to see the entire image of the card, the least mirror area needed is:

At what distance in front of a concave mirror must an object be placed so that the image and object are the same size?

An object is 20 cm to the left of a lens of focal length +10 cm.A second lens, of focal length +12.5 cm, is 30 cm to the right of the first lens.The distance between the original object and the final image is:

When you stand in front of a plane mirror, your image is:

The objective lens of the Yerkes telescope (the largest functioning refracting telescope in the world)has a focal length of 19.4 m.If its eyepiece has a focal length of 2.5 cm, what is the magnitude of its magnification?

A converging lens of focal length 20 cm is placed in contact with, and to the left of, a diverging lens of focal length 30 cm.If an object is placed 40 cm to the left of the converging lens, the total magnification is:

The term "virtual" as applied to an image made by a mirror means that the image:

Consider the following four statements concerning a compound microscope: Which two of the four statements are correct?

In a two lens microscope, the intermediate image is:

Let fo and fe be the focal lengths of the objective and eyepiece of a compound microscope.In ordinary use, the object:

A magnifying glass has a focal length of 15 cm.If the near point of the eye is 25 cm from the eye the angular magnification of the glass is about:

Measurement

Motion Along a Straight Line

Vector

Motion in Two and Three Dimensions

Force and Motion I

Force and Motion II

Kinetic Energy and Work

Potential Energy and Conservation of Energy

Center of Mass and Linear Momentum

Rotation

Rolling, Torque, and Angular Momentum

Equilibrium and Elasticity

Gravitation

Fluids

Oscillations

Waves I

Waves II

Temperature, Heat, and the First Law of Thermodynamics

The Kinetic Theory of Gases

Entropy and the Second Law of Thermodynamics

Electric Charge

Electric Fields

Gauss Law

Electric Potential

Capacitance

Current and Resistance

Circuits

Magnetic Fields

Magnetic Fields Due to Currents

Induction and Inductance

Electromagnetic Oscillations and Alternating Current

Maxwells Equations; Magnetism of Matter

Electromagnetic Waves

Interference

Diffraction

Relativity

Photons and Matter Waves

More About Matter Waves

All About Atoms

Conduction of Electricity in Solids

Nuclear Physics

Energy From the Nucleus

Quarks, Leptons, and the Big Bang

Filters

A hollow lens is made of thin glass as shown.It can be filled with air, water (n = 1.3)or CS₂ (carbon disulfide, n = 1.6).A beam of parallel light entering the lens will diverge if the lens is filled with:

Let f_o and f_e be the focal lengths of the objective and eyepiece of a compound microscope.In ordinary use, the object: