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news_040111 - a a sin θ n d = n = ⇒ θ n d = sin-1 n ...

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Stuff for Friday, April 1, 2011 Stop at 4:05pm for closed-book Quiz 1 (on Q1 and Q2) Are you checking the course web page? E.g., new assignments, solutions for 1094, PS#1, etc. Any questions on PS#2? Photoelectric effect on Monday. Preview with applet. Two-slit interference with slit separation d d sin θ n c = n λ = θ n c = sin - 1 n λ d n λ d ( constructive ) Diffraction: waves spread when passing through “slit” of width
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Unformatted text preview: a a sin θ n d = n λ = ⇒ θ n d = sin-1 n λ a ≈ n λ a ( destructive) Fourier transform coefficients A n for square wave: f ( x ) = -A for-L / 2 ≤ x < A for 0 ≤ x < L / 2 f ( x ) = ∞ X n = 1 A n sin “ 2 π nx L ” = ⇒ A m = Z L / 2-L / 2 sin “ 2 π mx L ” f ( x ) = ( if m even A 4 π 1 n if m odd...
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