chp41_2 - 1 , 2 ± ± = = ∆ = ∆ m m r m ( max...

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PHY2061 R. D. Field Department of Physics chp41_2.doc University of Florida Interference Wave Superposition: Consider the addition ( superposition ) of two waves with the same amplitude and wavelength: 2 1 2 1 ) sin( )) ( sin( ) sin( y y y kx A r x k A y kx A y sum + = + = + = = φ The "phase shift" , ∆φ ∆φ , between the two waves is related to the quantity r by r k = or λ π r = 2 where k=2 π / λ is the wave number and λ is the wavelength. Maximal Constructive Interference: The condition for maximal constructive interference is K , 2 ,
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Unformatted text preview: 1 , 2 ± ± = = ∆ = ∆ m m r m ( max constructive ) Maximal Destructive Interference: The condition for maximal destructive interference is K , 2 , 1 , 2 1 2 ± ± = + = ∆ + = ∆ m m r m ( max destructive ) Wave Superposition -2.0 -1.5 -1.0 -0.5 0.0 0.5 1.0 1.5 2.0 0 1 2 3 4 5 6 7 8 kx (radians) y sum = y 1 +y 2 y 2 =Asin(k(x+ ∆ r ) ) y 2 =Asin(kx) ∆ r &Lateral± shift...
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This note was uploaded on 05/31/2011 for the course PHY 2061 taught by Professor Fry during the Spring '08 term at University of Florida.

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