274Chapt. 36Interferenceb)dcosθ=nλ.c)d2sinθ=nλ.d)dsinθ=nλ.e) sinθ=n.Full-Answer Problems036 qfull 00100 1 3 0 easy math: sodium line, index of refractionExtra keywords:(HRW-884:1E)1. The wavelength of the yellow sodium D lines in air is approximately 0.589μm. Note the indexof refraction of air at 0◦C and 1 atm is 1.000293 (HZ-38).a) What is the frequency of this light?b) What is wavelength in glass with index of refractionn= 1.52?c) What is the speed of light in this glass?036 qfull 00200 1 5 0 easy thinking: waves on beachExtra keywords:(HRW-884:5P)2. Consider ocean waves moving at 4.0 m/s incident on a beach at angle of 40◦to the normal tothe beach. (Here the angle refers to the direction that waves are moving in, not to the angle setby the line of their crests.) Suddenly they cross into a shallower region where the wave speedis only 3.0 m/s.NOTE:I derived this problem from HRW. I assume they know what they aretalking about.
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