121. When you look at yourself in a 30-cm tall planemirror, you see the same amount of your body whetheryou are close to the mirror or far away. (Try it andsee.) Use ray diagrams to show why this should betrue.122. A 4.00-cm tall object is placed a distance of 48cm from a concave mirror having a focal length of16cm. Determine the image distance and the imagesize.123. If you look at yourself in a shiny Christmas treeball with a diameter of 9.0 cm when your face is 30.0cm away from it, where is your image? Is it real orvirtual? Is it upright or inverted?124. A dentist wants a small mirror that, when 2.20 cmfrom a tooth, will produce an upright image withmagnification of 4.5. What kind of mirror must beused and what must its radius of curvature be?

To prove by ray diagram that we see same amount of our body in a plane mirror of specific height…

121. When you look at yourself in a 30-cm tall plane mirror, you see the same amount of your body whether you are close to the mirror or far away. (Try it and see.) Use ray diagrams to show why this should be true.

121. When you look at yourself in a 30-cm tall plane mirror, you see the same amount of your body whether you are close to the mirror or far away. (Try it and see.) Use ray diagrams to show why this should be true.

College Physics

10th Edition

ISBN:9781285737027

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter23: Mirrors And Lenses

Section: Chapter Questions

Problem 4CQ: Construct ray diagrams to determine whether each of the following statement is true (T) or false...

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Concept explainers

Nature of light

Light is transverse and electromagnetic radiation that exhibits the properties of a wave as well as a particle. For this reason, light is said to have a “dual nature.”

Question

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121. When you look at yourself in a 30-cm tall plane
mirror, you see the same amount of your body whether
you are close to the mirror or far away. (Try it and
see.) Use ray diagrams to show why this should be
true.
122. A 4.00-cm tall object is placed a distance of 48
cm from a concave mirror having a focal length of
16cm. Determine the image distance and the image
size.
123. If you look at yourself in a shiny Christmas tree
ball with a diameter of 9.0 cm when your face is 30.0
cm away from it, where is your image? Is it real or
virtual? Is it upright or inverted?
124. A dentist wants a small mirror that, when 2.20 cm
from a tooth, will produce an upright image with
magnification of 4.5. What kind of mirror must be
used and what must its radius of curvature be?

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