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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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 — 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 “none”. 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 “none”.
Question: In the Figure, light enters a triangular prism at point Pwith incident angle , and then some of it refracts at point Qwith an angle of refraction of .(a) What is the index of refraction of the prism in terms of ?(b) What, numerically, is the maximum value that the index of refraction can have?(c) Does light emerge at Qif the incident angle at Pis increased slightly? and (d) Does light emerge at Qif the incident angle at Pis decreased slightly?
Figure:
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?
A ray of white light traveling through fused quartz is incident at a quartz–air interface at angle.Assume that the index of refraction of quartz is at the red end of the visible range and at the blue end.If is(a) , (b),and (c),is the refracted light white, white dominated by the red end of the visible range, or white dominated by the blue end of the visible range, or is there no refracted light?
Question: A catfish is below the surface of a smooth lake. (a) What is the diameter of the circle on the surface through which the fish can see the world outside the water? (b) If the fish descends, does the diameter of the circle increase, decrease, or remain the same?
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