Chapter 5: Q7DQ (page 1151)
When a room has mirrors on two opposite walls, an infinite series of reflections can be seen. Discuss this phenomenon in terms of images. Why do the distant images appear fainter?
Distant images appear fainter because each image acts as an object for the other mirror and so on.
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Could an experiment similar to Young’s two-slit experiment be performed with sound? How might this be carried out? Does it matter that sound waves are longitudinal and electromagnetic waves are transverse? Explain.
Sometimes when looking at a window, you see two reflected images slightly displaced from each other. What causes this?
A rainbow ordinarily shows a range of colors. But if the water droplets that form the rainbow are small enough, the rainbow will appear white. Explain why, using diffraction ideas. How small do you think the raindrops would have to be for this to occur?
For what range of object positions does a concave spherical mirror form a real image? What about a convex spherical mirror?
A fellow student, who values memorizing equations above understanding them, combines Eq. (35.4) and (35.13) to “prove” that can only equal localid="1663905625404" . How would you explain to this student that can have values other than localid="1663906387916" ?
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