Question

4.2 Multi Slit Data 1) Describe qualitatively the differences in the interference patterns for the two multi slits you used compared to each other and com- pared to the double slits.

Answer 1

Slits plays important role for Interference patterns. As the number of slits increase fringe width also increases thats because with more slite the tig light waves travels through have move interference for appear As we all know if we pass a light through large number of evenly spaced paralled slits it is called diffraction grating. Now, difference between double sit and multiple slits is that after getting interference pattern with two slits we can change our analysis by adding more slits in it. when number of slits increases there is more dark fringes between interference The multiple slit arrangement is presumed by constructed from a number of identical slits, each of which provides light distributed according to Single Sit diffraction expression

I For e. g Double-slit a inter . INN parallel hays e parall 19 Ar is the path length path length difference difference Aradsin(om zma, m 0, 1, 2 Interference atterns are red curves __ +30 . • N-slit interference Here dis the spacing between slut . Centers

classmate Date Page I o Actual patterns are red Curves | So, we see that for multiple slits these stripes are thinner os sharper and even once we can't register them et his happens when wel increase suts.