p36_019 - 19. The maxima of a two-slit interference pattern...

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19. The maxima of a two-slit interference pattern are at angles θ given by d sin θ = ,where d is the slit separation, λ is the wavelength, and m is an integer. If θ is small, sin θ may be replaced by θ in radians. Then, = . The angular separation of two maxima associated with diFerent wavelengths but the same value of m is ∆ θ =( m/d )( λ 2 λ 1 ), and their separation on a screen a distance
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