- #1
yo_man
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Homework Statement
You want to photograph a circular diffraction pattern whose central maximum has a diameter of 1.0 cm. You have a helium-neon laser (lambda=633 nm) and a 0.12-mm-diameter pinhole.
How far behind the pinhole should you place the viewing screen?
Homework Equations
The Attempt at a Solution
I'm not understanding how to go about doing this/starting this question