Each of the slits is separately illuminated by a broad laser beam. Which option below explains why this produces a broader brightly illuminated region on the screen at the right?
1) The interference pattern is enhanced due to the diffraction of light at each slit.
2) The interference pattern is reduced due to the diffraction of light at each slit.
3) The interference pattern is enhanced due to the interference of light waves from each slit.
4) The interference pattern is reduced due to the interference of light waves from each slit.



Answer :