(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Light with a wavelength of 400nm passes through a 1.00x10^4 lines/cm diffraction grating. What is the second order angle of diffraction?

a) 21.3 c)56.5

b) 53.1 d) 72.1

2. Relevant equations

d*sin(theta)=m* wavelength

3. The attempt at a solution

I rearranged the equation to: Theta= sin^-1({wavelength*order}/ d)

Theta= sin^-1 (4*10^-7*2/{1/1*10^2)= sin^-1(8*10^-9)= 4.58366

Obviously, this isnt the answer. Could someone show me how to figure these problems out? I have a test coming up and i am completely stumped on all of these types of questions.

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# Homework Help: Need help with a diffractiongrating problem.

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