The formula for the amplitude for a multislit grating is:(adsbygoogle = window.adsbygoogle || []).push({});

[tex]A(Y,t)=\frac{M}{R}cos \left(\frac{2 \pi R}{\lambda}-2 \pi f t \right) \frac{sin^2 \left[(2N+1) \frac{x}{2}\right]}{sin^2 \left[\frac{x}{2}\right]}[/tex]

a spectra would look something like this

I am trying to find a formula not for the amplitude of the giant maximas but of the height of the maxima rightafterthe giant maxima.

so I know maxima's occur when the denominator of sine is much smaller than the numerator. But how would I equate the maxima height right after the giant maxima?

any suggestions would be helpful

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

Dismiss Notice

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: Amplitude of multislit grating

Can you offer guidance or do you also need help?

Draft saved
Draft deleted

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