Light of wavelength 600nm falls on a 0.40-mm-wide slit and forms a diffraction pattern on a screen 1.5m away.(adsbygoogle = window.adsbygoogle || []).push({});

(a) Find the position of the first dark band on each side of the central maximum.

(b) Find the width of the central maximum

For the (a) I think that we use sinθ = +- λ / α

I think m is equal to : m = +- 1

Where λ = 600 nm

and α = 0.40 mm

If the way I have solved (a) is correct, then how do I proceed to (b) ? I know L is 1.5m then what?

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Wave Optics - Single Slit Diffraction

**Physics Forums | Science Articles, Homework Help, Discussion**