chp41_5 - maximal constructive interference is K , 2 , 1 ,...

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PHY2061 R. D. Field Department of Physics chp41_5.doc University of Florida Double Slit Interference The simplest way to produce a phase shift a difference in the path length between the two wave sources, S 1 and S 2 is with a double slit. The point P is located on a screen that is a distance L away from the slits and the slits are separated by a distance d . If L >> d then to a good approximation the path length difference is, θ sin 1 2 d r r r = = . Maximal Constructive Interference: The condition for
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Unformatted text preview: maximal constructive interference is K , 2 , 1 , sin ± ± = = m d m λ ( Bright Fringes - max constructive ) Maximal Destructive Interference: The condition for maximal destructive interference is K , 2 , 1 , 2 1 sin ± ± = + = m d m ( Dark Fringes -max destructive ) S 1 r 2 P S 2 r 1 d L y Double Slit S 1 r 2 S 2 r 1 d θ Double Slit θ d sin θ S 1 θ P S 2 d L y Double Slit y = L tan θ r Order of the Bright Fringe...
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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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