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Chapter 33: Q4Q (page 1000)
Figure 33-28 shows the electric and magnetic fields of an electromagnetic wave at a certain instant. Is the wave traveling into the page or out of the page?
The direction of the wave is into the page.
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In Fig. 33-35, light travels from material a, through three layers of other materials with surfaces parallel to one another, and then back into another layer of material a. The refractions (but not the associated reflections) at the surfaces are shown. Rank the materials according to index of refraction, greatest first. (Hint: The parallel arrangement of the surfaces allows comparison.
In the figure, initially unpolarized light is sent into a system of three polarizing sheets whose polarizing directions make angles ofwith the direction of theyaxis. What percentage of the initial intensity is transmitted by the system? (Hint: Be careful with the angles.)
Figure:
Figure 33-31 shows the multiple reflections of a light ray along a glass corridor where the walls are either parallel or perpendicular to one another. If the angle of incidence at point a is, what are the angles of reflection of the light ray at points b, c, d, e, and f?
An isotropic point source emits light at wavelength, at the rate of. A light detector is positionedfrom the source. What is the maximum rate at which the magnetic component of the light changes with time at the detector鈥檚 location?
Sunlight just outside Earth鈥檚 atmosphere has an intensity of. Calculate (a) and (b)for sunlight there, assuming it to be a plane wave.
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