Chapter 25: Q27CQ (page 928)
Devise an arrangement of mirrors allowing you to see the back of your head. What is the minimum number of mirrors needed for this task?
The minimum number of mirrors required is two for this task.
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Models are particularly useful in relativity and quantum mechanics, where conditions are outside those normally encountered by humans. What is a model?
Suppose Figure 25.54represents a ray of light going from air through crown glass into water, such as going into a fish tank. Calculate the amount the ray is displaced by the glass , given that the incident angle isand the glass is1.00 cmthick.
Figure 25.54shows a ray of light passing from one medium into a second and then a third. Show that Q3is the same as it would be if the second medium were not present (provided total internal reflection does not occur).
A shopper standing \(3.00{\rm{ }}m\)from a convex security mirror sees his image with a magnification of \(0.250\).
(a) Where is his image?
(b) What is the focal length of the mirror?
(c) What is its radius of curvature? Explicitly show how you follow the steps in the Problem-Solving Strategy for Mirrors.
Figure 25.49shows a light bulb between two mirrors. One mirror produces a beam of light with parallel rays; the other keeps light from escaping without being put into the beam. Where is the filament of the light in relation to the focal point or radius of curvature of each mirror?
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