Diffraction and double slit interference

[prashant3507]

hey during proof of expression of double slit interference at a point ,we take into account the interference due to 2 light rays emerging from 2 different slits. here why don't we account for the the interference also due to to light rays emerging from the same slit as in the single slit interference?

 

[Doc Al]

It's just easier to discuss each effect separately. The real deal combines the interference of the double slit with the diffraction of the single slit: Double Slit Diffraction

 

[Claude Bile]

Usually the slits are assumed to be infinitely thin, or possesses some other comparable idealisation, to remove the effect of single-slit diffraction - for the purposes of clarity as Doc Al said.

Claude.