Question 1

The optical path for visible light in a lens is

Accepted Answer

A)  the same as the geometrical path. 
B)  the same no matter what portion of the lens it passes through. 
C)  the same as the optical path for ultraviolet. 
D)  independent of the material of which the lens is constructed. 
E)  is increased when the index of refraction is increased. 
A)  the same as the geometrical path. 
B)  the same no matter what portion of the lens it passes through. 
C)  the same as the optical path for ultraviolet. 
D)  independent of the material of which the lens is constructed. 
E)  is increased when the index of refraction is increased.

Question 2

The lens of a slide projector has a focal length of +12.0 cm. A slide 12.6 cm to the left of the lens forms the object for the lens. The screen should be placed

Accepted Answer

A)  25 cm to the left of the lens. 
B)  25 cm to the right of the lens. 
C)  250 cm to the left of the lens. 
D)  250 cm to the right of the lens. 
E)  390 cm to the right of the lens. 
A)  25 cm to the left of the lens. 
B)  25 cm to the right of the lens. 
C)  250 cm to the left of the lens. 
D)  250 cm to the right of the lens. 
E)  390 cm to the right of the lens.

Question 3

When an object is closer to a concave mirror than the mirror's focal point, the

Accepted Answer

A)  magnification is less than one. 
B)  image distance is greater than the object distance. 
C)  magnification is equal to one. 
D)  image distance is negative. 
E)  image is inverted. 
A)  magnification is less than one. 
B)  image distance is greater than the object distance. 
C)  magnification is equal to one. 
D)  image distance is negative. 
E)  image is inverted.

Question 4

A converging lens and a screen are so arranged that an image of the sun falls on the screen. The distance from the lens to the screen is

Accepted Answer

A)  the focal length. 
B)  the object distance. 
C)  the magnifying power. 
D)  one-half the radius of curvature of one of the lens faces. 
E)  the average radius of curvature of the two lens faces. 
A)  the focal length. 
B)  the object distance. 
C)  the magnifying power. 
D)  one-half the radius of curvature of one of the lens faces. 
E)  the average radius of curvature of the two lens faces.

Question 5

A circular coin is 33.3 cm from a concave spherical mirror. (Assume the coin is on the optical axis.) The image of the coin is produced 23.3 cm towards the mirror from its real position. Calculate the focal length of the mirror.

Accepted Answer

A)  15.4 cm 
B)  7.69 cm 
C)  13.7 cm 
D)  27.4 cm 
E)  10.0 cm 
A)  15.4 cm 
B)  7.69 cm 
C)  13.7 cm 
D)  27.4 cm 
E)  10.0 cm

Question 6

The index of refraction of the lenses with respect to the medium is n. The diagram that correctly represents a wave front passing through a lens is

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
E)  5 
A)  1 
B)  2 
C)  3 
D)  4 
E)  5

Question 7

A negative lens with a focal length of -10.0 cm is on the same axis as a positive lens with a focal length of +20.0 cm as illustrated. The distance between the lenses is 20.0 cm. A real object 3.00 cm high is placed 20.0 cm to the left of the negative lens. After the light has passed through both lenses, the image is

Accepted Answer

A)  3.0 cm high and virtual. 
B)  1.0 cm high and virtual. 
C)  1.0 cm high and real. 
D)  3.0 cm high and real. 
E)  None of these is correct. 
A)  3.0 cm high and virtual. 
B)  1.0 cm high and virtual. 
C)  1.0 cm high and real. 
D)  3.0 cm high and real. 
E)  None of these is correct.

Question 8

Two lenses, one with a focal length f1 = +20 cm and the other with a focal length f2  = -20 cm, are on the same axis and 60 cm apart as shown. A real object is 40 cm to the left of the positive lens. The image formed by the negative lens is

Accepted Answer

A)  real and 10 cm from the negative lens. 
B)  virtual and 10 cm from the negative lens. 
C)  at infinity. 
D)  virtual and 20 cm from the negative lens. 
E)  None of these is correct. 
A)  real and 10 cm from the negative lens. 
B)  virtual and 10 cm from the negative lens. 
C)  at infinity. 
D)  virtual and 20 cm from the negative lens. 
E)  None of these is correct.

Question 9

A concave spherical mirror has a radius of curvature of 50 cm. The image of an object located 35 cm in front of the mirror is

Accepted Answer

A)  real, inverted, magnified 2.5 times, and 87.5 cm from the mirror. 
B)  real, erect, magnified 2.5 times, and 87.5 cm from the mirror. 
C)  virtual, erect, magnified 3.3 times, and 117 cm from the mirror. 
D)  real, inverted, magnified 3.3 times, and 117 cm from the mirror. 
E)  real, inverted, diminished 0.42 times, and 14.6 cm from the mirror. 
A)  real, inverted, magnified 2.5 times, and 87.5 cm from the mirror. 
B)  real, erect, magnified 2.5 times, and 87.5 cm from the mirror. 
C)  virtual, erect, magnified 3.3 times, and 117 cm from the mirror. 
D)  real, inverted, magnified 3.3 times, and 117 cm from the mirror. 
E)  real, inverted, diminished 0.42 times, and 14.6 cm from the mirror.

Question 10

An object is located 4 cm from a converging lens of focal length 3 cm. The magnitude of the magnification of the image is

Accepted Answer

A)  3 
B)  4 
C)  9 
D)  12 
E)  16 
A)  3 
B)  4 
C)  9 
D)  12 
E)  16

Question 11

Your left eye can focus on objects a great distance away but cannot focus on objects that are closer than 125 cm to it. The power of the lens in diopters that you need for normal near vision (25 cm) is

Accepted Answer

A)  +0.8 diopters 
B)  +3.2 diopters 
C)  +4.0 diopters 
D)  -4.0 diopters 
E)  None of these is correct. 
A)  +0.8 diopters 
B)  +3.2 diopters 
C)  +4.0 diopters 
D)  -4.0 diopters 
E)  None of these is correct.

Question 12

An object placed 4 cm to the left of a positive lens of focal length 2 cm produces an image 4 cm to the right of the lens. A negative lens placed at the focal point of the positive lens as shown produces a final image 6 cm to the right of the negative lens. The negative lens has a focal length of

Accepted Answer

A)  -1.5 cm 
B)  -3.0 cm 
C)  -6.0 cm 
D)  10 cm 
E)  -2.0 cm 
A)  -1.5 cm 
B)  -3.0 cm 
C)  -6.0 cm 
D)  10 cm 
E)  -2.0 cm

Question 13

A concave spherical mirror can produce which one of the following types of images?

Accepted Answer

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

Question 14

A real object in front of a concave spherical mirror can produce an image that is

Accepted Answer

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

Question 15

A convenience's store clerk observes at shopper 4 m in front of a convex mirror. The image of the shopper is located 1.5 m behind the mirror. The focal length of the mirror is

Accepted Answer

A)  -2.5 m 
B) -2.4 m 
C)  -0.67 m 
D) -1.1 m 
E)  none of the above 
A)  -2.5 m 
B) -2.4 m 
C)  -0.67 m 
D) -1.1 m 
E)  none of the above

Question 16

The graph shows the reciprocal of the image distance plotted against the reciprocal of the object distance for a certain lens. From this graph it can be seen that this lens has a focal length of

Accepted Answer

A)  0.20 m 
B)  1.0 m 
C)  4.0 m 
D)  0.25 m 
E)  -1.0 m 
A)  0.20 m 
B)  1.0 m 
C)  4.0 m 
D)  0.25 m 
E)  -1.0 m

Question 17

An object is placed 4.24 cm in front of a concave mirror that has a radius of curvature of 20.3 cm. The image is located

Accepted Answer

A)  12.1 cm in front of the mirror. 
B)  12.1 cm behind the mirror. 
C)  7.62 cm behind the mirror. 
D)  16.9 cm behind the mirror. 
E)  16.9 cm in front of the mirror. 
A)  12.1 cm in front of the mirror. 
B)  12.1 cm behind the mirror. 
C)  7.62 cm behind the mirror. 
D)  16.9 cm behind the mirror. 
E)  16.9 cm in front of the mirror.

Question 18

A typical farsighted person requires

Accepted Answer

A)  glasses with converging lenses to drive. 
B)  glasses with diverging lenses to drive. 
C)  glasses with converging lenses to read. 
D)  glasses with diverging lenses to read. 
E)  no glasses to read. 
A)  glasses with converging lenses to drive. 
B)  glasses with diverging lenses to drive. 
C)  glasses with converging lenses to read. 
D)  glasses with diverging lenses to read. 
E)  no glasses to read.

Question 19

When you stand in water up to your knees, your feet appear

Accepted Answer

A)  closer than usual. 
B)  farther away than usual. 
C)  at the same location as usual. 
D)  To answer this you must know your height and the depth of the water. 
E)  To answer this you must know the index of refraction of water. 
A)  closer than usual. 
B)  farther away than usual. 
C)  at the same location as usual. 
D)  To answer this you must know your height and the depth of the water. 
E)  To answer this you must know the index of refraction of water.

Question 20

The image of an object located 10 cm from a concave spherical mirror of radius 10 cm is

Accepted Answer

A)  real, inverted, and magnified. 
B)  real, inverted, and diminished. 
C)  real, inverted, and the same size. 
D)  virtual, erect, and magnified. 
E)  virtual, erect, and diminished. 
A)  real, inverted, and magnified. 
B)  real, inverted, and diminished. 
C)  real, inverted, and the same size. 
D)  virtual, erect, and magnified. 
E)  virtual, erect, and diminished.

The optical path for visible light in a lens is

The lens of a slide projector has a focal length of +12.0 cm. A slide 12.6 cm to the left of the lens forms the object for the lens. The screen should be placed

When an object is closer to a concave mirror than the mirror's focal point, the

A converging lens and a screen are so arranged that an image of the sun falls on the screen. The distance from the lens to the screen is

A circular coin is 33.3 cm from a concave spherical mirror. (Assume the coin is on the optical axis.) The image of the coin is produced 23.3 cm towards the mirror from its real position. Calculate the focal length of the mirror.

$The index of refraction of the lenses with respect to the medium is n. The diagram that correctly represents a wave front passing through a lens is$ The index of refraction of the lenses with respect to the medium is n. The diagram that correctly represents a wave front passing through a lens is

Two lenses, one with a focal length f₁ = +20 cm and the other with a focal length f₂ = -20 cm, are on the same axis and 60 cm apart as shown. A real object is 40 cm to the left of the positive lens. The image formed by the negative lens is

A concave spherical mirror has a radius of curvature of 50 cm. The image of an object located 35 cm in front of the mirror is

An object is located 4 cm from a converging lens of focal length 3 cm. The magnitude of the magnification of the image is

Your left eye can focus on objects a great distance away but cannot focus on objects that are closer than 125 cm to it. The power of the lens in diopters that you need for normal near vision (25 cm) is

An object placed 4 cm to the left of a positive lens of focal length 2 cm produces an image 4 cm to the right of the lens. A negative lens placed at the focal point of the positive lens as shown produces a final image 6 cm to the right of the negative lens. The negative lens has a focal length of

A concave spherical mirror can produce which one of the following types of images?

A real object in front of a concave spherical mirror can produce an image that is

A convenience's store clerk observes at shopper 4 m in front of a convex mirror. The image of the shopper is located 1.5 m behind the mirror. The focal length of the mirror is

The graph shows the reciprocal of the image distance plotted against the reciprocal of the object distance for a certain lens. From this graph it can be seen that this lens has a focal length of

An object is placed 4.24 cm in front of a concave mirror that has a radius of curvature of 20.3 cm. The image is located

A typical farsighted person requires

When you stand in water up to your knees, your feet appear

The image of an object located 10 cm from a concave spherical mirror of radius 10 cm is

The Electric Field I: Discrete Charge Distributions

The Electric Field II: Continuous Charge Distributions

Electric Potential

Capacitance

Electric Current and Direct-Current Circuits

The Magnetic Field

Sources of the Magnetic Field

Magnetic Induction

Alternating-Current Circuits

Maxwells Equations and Electromagnetic Waves

Properties of Light

Interference and Diffraction

Wave Particle Duality and Quantum Physics

Applications of the Schrodinger Equation

Atoms

Molecules

Solids and the Theory of Conduction

Relativity

Nuclear Physics

Elementary Particles and the Beginning of the Universe

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Exam 12: Optical Images

The optical path for visible light in a lens is

The lens of a slide projector has a focal length of +12.0 cm. A slide 12.6 cm to the left of the lens forms the object for the lens. The screen should be placed

When an object is closer to a concave mirror than the mirror's focal point, the

A converging lens and a screen are so arranged that an image of the sun falls on the screen. The distance from the lens to the screen is

A circular coin is 33.3 cm from a concave spherical mirror. (Assume the coin is on the optical axis.) The image of the coin is produced 23.3 cm towards the mirror from its real position. Calculate the focal length of the mirror.

The index of refraction of the lenses with respect to the medium is n. The diagram that correctly represents a wave front passing through a lens is

Two lenses, one with a focal length f1 = +20 cm and the other with a focal length f2 = -20 cm, are on the same axis and 60 cm apart as shown. A real object is 40 cm to the left of the positive lens. The image formed by the negative lens is

A concave spherical mirror has a radius of curvature of 50 cm. The image of an object located 35 cm in front of the mirror is

An object is located 4 cm from a converging lens of focal length 3 cm. The magnitude of the magnification of the image is

Your left eye can focus on objects a great distance away but cannot focus on objects that are closer than 125 cm to it. The power of the lens in diopters that you need for normal near vision (25 cm) is

An object placed 4 cm to the left of a positive lens of focal length 2 cm produces an image 4 cm to the right of the lens. A negative lens placed at the focal point of the positive lens as shown produces a final image 6 cm to the right of the negative lens. The negative lens has a focal length of

A concave spherical mirror can produce which one of the following types of images?

A real object in front of a concave spherical mirror can produce an image that is

A convenience's store clerk observes at shopper 4 m in front of a convex mirror. The image of the shopper is located 1.5 m behind the mirror. The focal length of the mirror is

The graph shows the reciprocal of the image distance plotted against the reciprocal of the object distance for a certain lens. From this graph it can be seen that this lens has a focal length of

An object is placed 4.24 cm in front of a concave mirror that has a radius of curvature of 20.3 cm. The image is located

A typical farsighted person requires

When you stand in water up to your knees, your feet appear

The image of an object located 10 cm from a concave spherical mirror of radius 10 cm is

The Electric Field I: Discrete Charge Distributions

The Electric Field II: Continuous Charge Distributions

Electric Potential

Capacitance

Electric Current and Direct-Current Circuits

The Magnetic Field

Sources of the Magnetic Field

Magnetic Induction

Alternating-Current Circuits

Maxwells Equations and Electromagnetic Waves

Properties of Light

Interference and Diffraction

Wave Particle Duality and Quantum Physics

Applications of the Schrodinger Equation

Atoms

Molecules

Solids and the Theory of Conduction

Relativity

Nuclear Physics

Elementary Particles and the Beginning of the Universe

Filters

$The index of refraction of the lenses with respect to the medium is n. The diagram that correctly represents a wave front passing through a lens is$ The index of refraction of the lenses with respect to the medium is n. The diagram that correctly represents a wave front passing through a lens is

Two lenses, one with a focal length f₁ = +20 cm and the other with a focal length f₂ = -20 cm, are on the same axis and 60 cm apart as shown. A real object is 40 cm to the left of the positive lens. The image formed by the negative lens is