Chapter 37397P37.47My middle finger has width d=2 cm.(a)Two adjacent directions of constructive interference for 600-nm light are described bydmsinsinθλθ==×=×−−021702101610m mejThus,130=×−degreeandθθ10310−−~ degree.(b)Choose120=°020 172×°==−mmmafsinλMillimeter waves are microwaves.fc=:f=××−310710108311msmHz~P37.48If the center point on the screen is to be a dark spot rather than bright, passage through the plasticmust delay the light by one-half wavelength. Calling the thickness of the plastict.ttnntλλ+==12ortn=−where nis the index of refraction for the plastic.P37.49No phase shift upon reflection from the upper surface (glass to air) of the film, but there will be ashift of 2due to the reflection at the lower surface of the film (air to metal). The total phase
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