Question

in single slit diffraction pattern, which of the following is true for fringe pattern?

a) Equal width equal intensity
b) Unequal width unequal intensity
c) Unequal width equal intensity
d) Equal width unequal intensity​

Answer 1

option b) Unequal width unequal intensity

Answer 2

Single slit diffraction pattern

Explanation:

• Diffraction patterns created by light travelling through a single slit differ from those formed by light going through double slits or diffraction gratings.
• A single slit diffraction pattern is shown. It's worth noting that the middle maximum is larger than the ones on either side, and that the intensity on both sides drops swiftly.
• A diffraction grating, on the other hand, produces equally spaced lines that dim steadily on either side of the centre. A single slit diffraction analysis is demonstrated. We'll look at light that comes from different regions of the same slit.
• Every component of the wavefront in the slit emits wavelets, according to Huygens' principle. These are similar to rays that begin in phase and then spread out in all directions.
• (A wavelet's wavefront is perpendicular to each ray.) Assuming the screen is very large in comparison to the size of the slit, rays travelling to the same destination are virtually parallel.
• When they proceed straight forward, they stay in phase, resulting in a centre maximum. . A wavelength separates the beam from the bottom from the ray from the top.
• A ray coming from just above the centre and one coming from slightly above the bottom will cancel each other out as well.
• Another minimum will appear at the same angle to the right of the light's incidence direction.