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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In Fig. 33.31, since the light that is scattered out of the incident beam is polarized, why is the transmitted beam not also partially polarized?
A ray of light in air strikes a glass surface. Is there a range of angles for which total internal reflection occurs? Explain.
34.12 For a concave spherical mirror that has focal length f=+18 cm, what is the distance of an object from the mirror’s vertex if the image is real and has the same height as the object?
Ordinary photographic film reverses black and white, in the sense that the most brightly illuminated areas become blackest upon development (hence the term negative). Suppose a hologram negative is viewed directly, without making a positive transparency. How will the resulting images differ from those obtained with the positive? Explain.
When a converging lens is immersed in water, does itsfocal length increase or decrease in comparison with the value inair? Explain.
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