The Physics of Everyday Phenomena: A Conceptual Introduction to Physics

W. Thomas Griffith, Juliet Wain Brosing

Chapter 17

Light and Image Formation - all with Video Answers

Educators

Chapter Questions

Problem 1

Does either the velocity or the speed of light change when a beam of light is reflected from a mirror? Explain.

Vishal Gupta

Vishal Gupta

Numerade Educator

Problem 2

Does light actually pass through the position of the image formed by a plane mirror? Explain.

Vishal Gupta

Numerade Educator

Problem 3

How can an image lie behind a mirror hanging on a wall when no light can reach that point? Explain.

Vishal Gupta

Numerade Educator

Problem 4

When you view your image in a plane mirror, your right hand appears to be your left hand and vice versa. Explain how this reversal occurs.

Supratim Pal

Numerade Educator

Problem 5

If you want to view your full height in a plane mirror, must the mirror be as tall as you are? Explain using a ray diagram.

Devi Dutta Biswajeet

Devi Dutta Biswajeet

Numerade Educator

Problem 6

Can a plane mirror focus light rays to a point like a positive lens does? Explain.

Vishal Gupta

Numerade Educator

Problem 7

Objects $A, B,$ and $C$ lie in the next room hidden from direct view of the person shown in the diagram. A plane mirror is placed on the wall of the passageway between the two rooms as shown. Which of the objects will the person be able to see in the mirror? Explain using a ray diagram.

Vishal Gupta

Numerade Educator

Problem 8

When two plane mirrors are joined at right angles to one another, three images of an object can be seen. The image of the object formed by each mirror can serve as object for the other mirror. Where is the third image located? Explain using a ray diagram.

Linda Winkler

Numerade Educator

Problem 9

A light ray traveling in water $(n=1.33)$ passes from the water into a rectangular piece of glass $(n=1.5)$. Is the light ray bent toward the surface normal (the axis drawn perpendicular to the surface) of the glass or away from that axis? Explain.

Vishal Gupta

Numerade Educator

Problem 10

Does either the speed or the velocity of light change when light passes from air into a glass block? Explain.

Vishal Gupta

Numerade Educator

Problem 11

When we view an underwater object, is the image we see a real image or a virtual image? Explain.

Vishal Gupta

Numerade Educator

Problem 12

A fish swimming in a pond looks up at an object lying a couple of feet above the surface of the water. Does this object appear to the fish to lie nearer to the surface or farther from the surface than its actual distance? Explain.

Vishal Gupta

Numerade Educator

Problem 13

A light ray traveling in glass for which the critical angle is $42^{\circ}$ strikes a surface between the glass and air at an angle of $45^{\circ}$ to the surface normal. Is this ray refracted into the air at this surface? Explain.

Vishal Gupta

Numerade Educator

Problem 14

Do light waves of different colors all travel at the same speed in glass? Explain.

Vishal Gupta

Numerade Educator

Problem 15

Is reflection or refraction responsible for the separation of colors in a rainbow? Explain.

Vishal Gupta

Numerade Educator

Problem 16

Can we see a rainbow looking eastward if it is raining in the early morning? Explain.

Vishal Gupta

Numerade Educator

Problem 17

An object is located at a distance twice the focal length from a positive lens. Trace three rays from the top of the object to locate the image. Is the image real or virtual, erect or inverted?

Vishal Gupta

Numerade Educator

Problem 18

Is it possible to form a virtual image with a positive (converging) lens? Explain.

Vishal Gupta

Numerade Educator

Problem 19

An object is located at the left-side focal point of a negative lens. Trace three rays from the top of the object to locate the image. Is the image real or virtual, erect or inverted?

Vishal Gupta

Numerade Educator

Problem 20

Is there any position that an object could be placed in front of a negative (diverging) lens that will result in the formation of a real image? Explain.

Vishal Gupta

Numerade Educator

Problem 21

Suppose that light rays approach a negative lens so that they are converging toward the focal point on the far side of the lens. Will these rays be diverging when they leave the lens? Explain.

Vishal Gupta

Numerade Educator

Problem 22

Do rays traveling parallel to the axis of a concave mirror pass through the center of curvature of the mirror after they are reflected? Explain.

Vishal Gupta

Numerade Educator

Problem 23

An object is located at the center of curvature of a concave mirror. Trace two rays from the top of the object to locate the image formed by the mirror. Is the image real or virtual, upright or inverted? Explain.

Vishal Gupta

Numerade Educator

Problem 24

An object is located inside the focal point of a concave mirror. Will the image of the object be nearer or farther from the observer than the object itself? Explain.

Vishal Gupta

Numerade Educator

Problem 25

Is there any distance at which an object can be located in front of a convex mirror that will produce a real image? Explain.

Vishal Gupta

Numerade Educator

Problem 26

Why would you use a convex mirror rather than a concave or plane mirror for viewing activities in a store aisle? Explain.

Vishal Gupta

Numerade Educator

Problem 27

When a convex mirror is used as a side-view mirror on an automobile, where is the image located? Why does printing on the mirror warn you that vehicles may be closer than they appear to be when viewed in the mirror? Explain.

Vishal Gupta

Numerade Educator

Problem 28

Does a nearsighted person have trouble seeing near objects? Explain.

Vishal Gupta

Numerade Educator

Problem 29

Would you use a positive lens or a negative lens to correct the vision of a farsighted person? Explain.

Vishal Gupta

Numerade Educator

Problem 30

Does each of the two lenses used in a microscope produce a magnification of the object being viewed? Explain.

Vishal Gupta

Numerade Educator

Problem 31

Does each of the two lenses used in a telescope produce a magnification of the object being viewed? Explain.

Vishal Gupta

Numerade Educator

Problem 32

Is it possible to produce an angular magnification of an object by simply bringing the object closer to your eye? Explain.

Linda Winkler

Numerade Educator

Problem 33

Is the objective lens of a microscope likely to have a longer focal length than that of the objective lens of a telescope? Explain.

Vishal Gupta

Numerade Educator

Problem 34

What advantages might there be to using binoculars rather than an astronomical telescope for viewing distant objects on land? Explain.

Linda Winkler

Numerade Educator