ch36-p056 - 56. Since the slit width is much less than the...

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56. Since the slit width is much less than the wavelength of the light, the central peak of the single-slit diffraction pattern is spread across the screen and the diffraction envelope can be ignored. Consider three waves, one from each slit. Since the slits are evenly spaced, the phase difference for waves from the first and second slits is the same as the phase difference for waves from the second and third slits. The electric fields of the waves at the screen can be written as 10 20 30 sin( ) sin( ) sin( 2 ) EE t t t ω φ = =+ where = (2 π d / λ ) sin θ . Here d is the separation of adjacent slits and
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This note was uploaded on 06/03/2011 for the course PHY 2049 taught by Professor Any during the Spring '08 term at University of Florida.

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