Ques 26 both the choices
Q.26. What is meant by diffraction? Draw a graph to show the relative intensity distribution for a single slit diffraction pattern. Obtain an expression for the diffraction of the first minimum and first maximum in the diffraction pattern.
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State Huygen's principle. Using the geometrical construction of secondary wavelets, explain the refraction of a plane wavefront incident on a plane surface. Hence verify Snell's law of refraction.