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) |

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) |

1 Answer

127 votes

**(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

127 votes

127