Question 1

Real images formed by a spherical mirror are always:

Accepted Answer

A) on the side of the mirror opposite the object 
B) on the same side of the mirror as the object but closer to the mirror than the object 
C) on the same side of the mirror as the object but closer to the mirror than the focal point 
D) on the same side of the mirror as the object but further from the mirror than the focal point 
E) none of the above 
A) on the side of the mirror opposite the object 
B) on the same side of the mirror as the object but closer to the mirror than the object 
C) on the same side of the mirror as the object but closer to the mirror than the focal point 
D) on the same side of the mirror as the object but further from the mirror than the focal point 
E) none of the above

Question 2

A camera with a lens of focal length 6.0 cm takes a picture of a 1.4-m man standing 11 m away.The height of the image is about:

Accepted Answer

A) 0.39 cm 
B) 0.77 cm 
C) 1.5 cm 
D) 3.0 cm 
E) 6.0 cm 
A) 0.39 cm 
B) 0.77 cm 
C) 1.5 cm 
D) 3.0 cm 
E) 6.0 cm

Question 3

Which instrument uses a single converging lens with the object placed just inside the focal point?

Accepted Answer

A) Camera 
B) Compound microscope 
C) Magnifying glass 
D) Overhead projector 
E) Telescope 
A) Camera 
B) Compound microscope 
C) Magnifying glass 
D) Overhead projector 
E) Telescope

Question 4

The focal length of a spherical mirror is N times its radius of curvature where N is:

Accepted Answer

A) 1/4 
B) 1/2 
C) 1 
D) 2 
E) 4 
A) 1/4 
B) 1/2 
C) 1 
D) 2 
E) 4

Question 5

An object is 2 m in front of a plane mirror.Its image is:

Accepted Answer

A) virtual, inverted, and 2 m behind the mirror 
B) virtual, inverted, and 2 m in front of the mirror 
C) virtual, erect, and 2 m in front of the mirror 
D) real, erect, and 2 m behind the mirror 
E) none of the above 
A) virtual, inverted, and 2 m behind the mirror 
B) virtual, inverted, and 2 m in front of the mirror 
C) virtual, erect, and 2 m in front of the mirror 
D) real, erect, and 2 m behind the mirror 
E) none of the above

Question 6

When a single-lens camera is focused on a distant object, the lens-to-film distance is found to be 40.0 mm.To focus on an object 0.540 m in front of the lens, the film-to-lens distance should be:

Accepted Answer

A) 36.8 mm 
B) 37.3 mm 
C) 40.0 mm 
D) 42.7 mm 
E) 43.2 mm 
A) 36.8 mm 
B) 37.3 mm 
C) 40.0 mm 
D) 42.7 mm 
E) 43.2 mm

Question 7

As an object is moved from a distant location toward the center of curvature of a concave mirror its image:

Accepted Answer

A) remains virtual and becomes smaller 
B) remains virtual and becomes larger 
C) remains real and becomes smaller 
D) remains real and becomes larger 
E) changes from real to virtual 
A) remains virtual and becomes smaller 
B) remains virtual and becomes larger 
C) remains real and becomes smaller 
D) remains real and becomes larger 
E) changes from real to virtual

Question 8

Which of the following is NOT correct for a simple magnifying glass?

Accepted Answer

A) the image is virtual 
B) the image is erect 
C) the image is larger than the object 
D) the object is inside the focal point 
E) the lens is diverging 
A) the image is virtual 
B) the image is erect 
C) the image is larger than the object 
D) the object is inside the focal point 
E) the lens is diverging

Question 9

An erect object is placed on the central axis of a thin lens, further from the lens than the magnitude of its focal length.The magnification is +0.4.This means:

Accepted Answer

A) the image is real and erect and the lens is a converging lens 
B) the image is real and inverted and the lens is a converging lens 
C) the image is virtual and erect, and the lens is a diverging lens 
D) the image is virtual and erect, and the lens is a converging lens 
E) the image is virtual and inverted and the lens is a diverging lens 
A) the image is real and erect and the lens is a converging lens 
B) the image is real and inverted and the lens is a converging lens 
C) the image is virtual and erect, and the lens is a diverging lens 
D) the image is virtual and erect, and the lens is a converging lens 
E) the image is virtual and inverted and the lens is a diverging lens

Question 10

A light bulb burns in front of the center of a 40-cm wide mirror that is hung vertically on a wall.A man walks in front of the mirror along a line that is parallel to the mirror and twice as far from it as the bulb.The greatest distance he can walk and see the image of the bulb at all times is:

Accepted Answer

A) 20 cm 
B) 40 cm 
C) 60 cm 
D) 80 cm 
E) 120 cm 
A) 20 cm 
B) 40 cm 
C) 60 cm 
D) 80 cm 
E) 120 cm

Question 11

A virtual image is one:

Accepted Answer

A) toward which light rays converge but do not pass through 
B) from which light rays diverge but do not pass through 
C) from which light rays diverge as they pass through 
D) toward which light rays converge and pass through 
E) with a ray normal to a mirror passing through it 
A) toward which light rays converge but do not pass through 
B) from which light rays diverge but do not pass through 
C) from which light rays diverge as they pass through 
D) toward which light rays converge and pass through 
E) with a ray normal to a mirror passing through it

Question 12

An object O, in air, is in front of the concave spherical refracting surface of a piece of glass.Which of the general situations depicted below is like this situation?

Accepted Answer

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

Question 13

A convex spherical surface with radius r separates a medium with index of refraction 2 from air.As an object in air is moved toward the surface from far away along the central axis, its image:

Accepted Answer

A) changes from virtual to real when it is a distance r/2 from the surface 
B) changes from virtual to real when it is a distance r from the surface 
C) changes from real to virtual when it is a distance r/2 from the surface 
D) changes from real to virtual when it is a distance r from the surface 
E) remains real 
A) changes from virtual to real when it is a distance r/2 from the surface 
B) changes from virtual to real when it is a distance r from the surface 
C) changes from real to virtual when it is a distance r/2 from the surface 
D) changes from real to virtual when it is a distance r from the surface 
E) remains real

Question 14

An object faces a spherical refracting surface.If r is negative,

Accepted Answer

A) the surface is convex. 
B) the surface is concave. 
C) the image must be real. 
D) the object distance must be negative. 
E) this cannot happen; r must be positive. 
A) the surface is convex. 
B) the surface is concave. 
C) the image must be real. 
D) the object distance must be negative. 
E) this cannot happen; r must be positive.

Question 15

The bellows of an adjustable camera can be extended so that the largest film to lens distance is one and one-half times the focal length.If the focal length is 12 cm, the nearest object which can be sharply focused on the film must be what distance from the lens?

Accepted Answer

A) 12 cm 
B) 24 cm 
C) 36 cm 
D) 48 cm 
E) 72 cm 
A) 12 cm 
B) 24 cm 
C) 36 cm 
D) 48 cm 
E) 72 cm

Question 16

A convex spherical mirror has a focal length of 12 cm.If an object is placed 6 cm in front of it the image position is:

Accepted Answer

A) 4 cm behind the mirror 
B) 4 cm in front of the mirror 
C) 12 cm behind the mirror 
D) 12 cm in front of the mirror 
E) at infinity 
A) 4 cm behind the mirror 
B) 4 cm in front of the mirror 
C) 12 cm behind the mirror 
D) 12 cm in front of the mirror 
E) at infinity

Question 17

The image of an erect candle, formed using a convex mirror, is always:

Accepted Answer

A) virtual, inverted, and smaller than the candle 
B) virtual, inverted, and larger than the candle 
C) virtual, erect, and larger than the candle 
D) virtual, erect, and smaller than the candle 
E) real, erect, and smaller than the candle 
A) virtual, inverted, and smaller than the candle 
B) virtual, inverted, and larger than the candle 
C) virtual, erect, and larger than the candle 
D) virtual, erect, and smaller than the candle 
E) real, erect, and smaller than the candle

Question 18

The angle between a horizontal ruler and a vertical plane mirror is 30$\degree$.The angle between the ruler and its image is:

Accepted Answer

A) 15$\degree$ 
B) 30$\degree$ 
C) 60$\degree$ 
D) 90$\degree$ 
E) 180$\degree$ 
A) 15$\degree$ 
B) 30$\degree$ 
C) 60$\degree$ 
D) 90$\degree$ 
E) 180$\degree$

Question 19

Roadway mirages are formed when:

Accepted Answer

A) the warm air above the hood of your car bends light from the sky, making the road appear wet 
B) a layer of cold air above the road bends light from the sky, making it look like there is a puddle on the road 
C) a layer of warm air above the road bends light from the sky, making it look like there is a puddle on the road 
D) a layer of cold air above the road bends light from the road so it looks wet when it is actually dry 
E) a layer of warm air above the road bends light from the road so it looks wet when it is actually dry 
A) the warm air above the hood of your car bends light from the sky, making the road appear wet 
B) a layer of cold air above the road bends light from the sky, making it look like there is a puddle on the road 
C) a layer of warm air above the road bends light from the sky, making it look like there is a puddle on the road 
D) a layer of cold air above the road bends light from the road so it looks wet when it is actually dry 
E) a layer of warm air above the road bends light from the road so it looks wet when it is actually dry

Question 20

A convex refracting surface has a radius of 12 cm.Light is incident in air (n = 1)and refracted into a medium with an index of refraction of 2.Light incident parallel to the central axis is focused at a point:

Accepted Answer

A) 3 cm from the surface 
B) 6 cm from the surface 
C) 12 cm from the surface 
D) 18 cm from the surface 
E) 24 cm from the surface 
A) 3 cm from the surface 
B) 6 cm from the surface 
C) 12 cm from the surface 
D) 18 cm from the surface 
E) 24 cm from the surface

Exam 34: Images

Real images formed by a spherical mirror are always:

A camera with a lens of focal length 6.0 cm takes a picture of a 1.4-m man standing 11 m away.The height of the image is about:

Which instrument uses a single converging lens with the object placed just inside the focal point?

The focal length of a spherical mirror is N times its radius of curvature where N is:

An object is 2 m in front of a plane mirror.Its image is:

When a single-lens camera is focused on a distant object, the lens-to-film distance is found to be 40.0 mm.To focus on an object 0.540 m in front of the lens, the film-to-lens distance should be:

As an object is moved from a distant location toward the center of curvature of a concave mirror its image:

Which of the following is NOT correct for a simple magnifying glass?

An erect object is placed on the central axis of a thin lens, further from the lens than the magnitude of its focal length.The magnification is +0.4.This means:

A light bulb burns in front of the center of a 40-cm wide mirror that is hung vertically on a wall.A man walks in front of the mirror along a line that is parallel to the mirror and twice as far from it as the bulb.The greatest distance he can walk and see the image of the bulb at all times is:

A virtual image is one:

An object O, in air, is in front of the concave spherical refracting surface of a piece of glass.Which of the general situations depicted below is like this situation?

A convex spherical surface with radius r separates a medium with index of refraction 2 from air.As an object in air is moved toward the surface from far away along the central axis, its image:

An object faces a spherical refracting surface.If r is negative,

The bellows of an adjustable camera can be extended so that the largest film to lens distance is one and one-half times the focal length.If the focal length is 12 cm, the nearest object which can be sharply focused on the film must be what distance from the lens?

A convex spherical mirror has a focal length of 12 cm.If an object is placed 6 cm in front of it the image position is:

The image of an erect candle, formed using a convex mirror, is always:

The angle between a horizontal ruler and a vertical plane mirror is 30 °\degree° .The angle between the ruler and its image is:

Roadway mirages are formed when:

A convex refracting surface has a radius of 12 cm.Light is incident in air (n = 1)and refracted into a medium with an index of refraction of 2.Light incident parallel to the central axis is focused at a point:

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The angle between a horizontal ruler and a vertical plane mirror is 30 $\degree$ .The angle between the ruler and its image is: