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## Homework Statement

Two diffraction gratings are stuck together, both with vertically aligned slits. Grating A has S1 slits and B has S2 slits.

What is the new equivalent grating that is the product of two of the diffraction gratings above?

(s1>s2>>>1)

## Homework Equations

a. N* = 1/d

## The Attempt at a Solution

Assuming that there are ajacent slits in both - I tried to think of a way that it will make sense.

If s1>s2 , s1 should be a multiple of s2, but I couldn't figure out a way to come to the new grating equivalent.