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Chapter 33: Q58P (page 1005)
Question: The index of refraction of benzene is. What is the critical angle for a light ray traveling in benzene toward a flat layer of air above the benzene?
The critical angle for the light ray is .
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Question: In Fig. 33-62, a light ray in air is incident at angle on a block of transparent plastic with an index of refraction of. The dimensions indicated are and. The light passes through the block to one of its sides and there undergoes reflection (inside the block) and possibly refraction (out into the air). This is the point offirst reflection. The reflected light then passes through the block to another of its sides 鈥� a point ofsecond reflection. If , on which side is the point of (a) first reflection and (b) second reflection? If there is refraction at the point of (c) first reflection, and (d) second reflection, give the angle of refraction; if not, answer 鈥渘one鈥�. If , on which side is the point of (e) first reflection and (f) second reflection? If there is refraction at the point of (g) first reflection, and (h) second reflection, give the angle of refraction; if not, answer 鈥渘one鈥�.
Project Seafarer was an ambitious program to construct an enormous antenna, buried underground on a site about in area. Its purpose was to transmit signals to submarines while they were deeply submerged. If the effective wavelength wereEarth radii, what would be the (a) frequency and(b) period of the radiations emitted? Ordinarily, electromagnetic radiations do not penetrate very far into conductors such as seawater, and so normal signals cannot reach the submarines.
When red light in vacuum is incident at the Brewster angle on a certain glass slab, the angle of refraction is .What are (a) the index of refraction of the glass and (b) the Brewster angle?
Suppose we rotate the second sheet in Fig. 33-15a, starting with the polarization direction aligned with the y axisand ending with it aligned with the x-axis. Which of the four curves in Fig. 33-26 best shows the intensity of the light through the three-sheet system during thisrotation?
In Fig. 33-77, an albatross glides at aconstant horizontallyabove level ground, moving in a vertical plane that contains the Sun. It glides toward a wallof height, which it will just barely clear. At that time of day, the angle of the Sun relative to the groundis.At what speed does the shadow of the albatross move (a) across the level ground and then (b) up the wall? Suppose that later a hawk happens to glide along the same path, alsoat.You see that when its shadow reaches the wall, the speed of the shadow noticeably increases. (c) Is the Sun now higher or lower in the sky than when the albatross flew by earlier? (d) If the speed of the hawk鈥檚 shadow on the wallis,what is the angle u of the Sun just then?
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