19. The maxima of a two-slit interference pattern are at angles θ given by d sin θ = mλ ,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, dθ = mλ . 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
This is the end of the preview. Sign up
access the rest of the document.