Question

Direction of first secondary maxima in fraunhofer diffraction pattern at single slit is given by

Answer 1

Considering Light Wave, combine 'TO' in the starting direction and 'P'.

Although there are steps in case of loop occurrence, but they reach the uneven distance of the 'P' journey.

Therefore, the point 'P' will be the maximum and the minimum intensity state, which depends on the path difference of the wave applied to 'P'.

There is a difference in the pitch difference and the P at the exit from A and B.