# Consider Fraunhoffer diffraction pattern obtained with a single slit at normal incidence. At the angular position of first diffraction minimum, the phase difference between the wavelets from the opposite edges of the slit is a) b) c) d)

## Question ID - 150212 :- Consider Fraunhoffer diffraction pattern obtained with a single slit at normal incidence. At the angular position of first diffraction minimum, the phase difference between the wavelets from the opposite edges of the slit is a) b) c) d)

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Answer Key : (d) -

(d)

To have the first minimum, the path difference between the waves from  and . The path difference between the waves from  and  at the same point should be  or phase difference is

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