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Unformatted text preview: ct we see that this extra distance is L sin θ. Thus the
time delay is
δt = L sin θ
1 2. The diﬀerence in path lengths between the waves reﬂected at the top and
bottom of the coating is twice the thickness. This must be equal to half the
wavelength. Thus the thickness is a quarter of the wavelength, 2 = 0.5cm.
3. Lorentz transformations are not needed since the emitted and reﬂected
frequencies are measured in the same reference frame. They do come into play if
we were to ask what is the frequency seen by the car. For a more detailed deri...
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This note was uploaded on 02/01/2013 for the course PHY 114 taught by Professor Jordan during the Spring '08 term at Rochester.
- Spring '08