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Chapter 27: Q12CQ (page 995)
What is the advantage of a diffraction grating over a double slit in dispersing light into a spectrum?
The light splits more easily because the slit widths are so narrow.
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Find the largest wavelength of light falling on double slits separated by 1.20 碌m for which there is a first-order maximum. Is this in the visible part of the spectrum?
Is there a phase change in the light reflected from either surface of a contact lens floating on a person鈥檚 tear layer? The index of refraction of the lens is about 1.5 , and its top surface is dry.
Calculate the wavelength of light that has its third minimum at an angle of 30.0潞 when falling on double slits separated by 3.00 碌m.
(a) What is the minimum angular spread of a \(633 - nm\) wavelength \({\rm{He - Ne}}\) laser beam that is originally \(1.00{\rm{ }}mm\) in diameter?
(b) If this laser is aimed at a mountain cliff \(15.0{\rm{ }}km\) away, how big will the illuminated spot be?
(c) How big a spot would be illuminated on the Moon, neglecting atmospheric effects? (This might be done to hit a corner reflector to measure the round-trip time and, hence, distance.) Explicitly show how you follow the steps in Problem-Solving Strategies for Wave Optics.
(a) How wide is a single slit that produces its first minimum for \({\rm{633 - nm}}\)light at an angle of \({\rm{28}}{\rm{.0}}^\circ \)? (b) At what angle will the second minimum be?
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