Ch. 36: Diffraction - Part A2December 7, 2009Young’s Interference Experiment!Thomas Young (1773-1829), an English polymath, proved in 1801 that light is a wave.
Ch. 36: Diffraction - Part A3December 7, 2009Young’s Interference Experiment!The interference pattern is determined by the path length difference ∆Lof the rays reaching a point P on the screen.!dis the distance between the two slits.!Angle θspecifies the location of the bright and dark fringes on the screen.!Need to relate θ, ∆L,dand λ.!∆Lis the distance S1to b.!Assume that the screen distance Dis much greater than d, thus r1and r2are parallel.sinθ∆=Ldsinθλλ∆⇒=Ld
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