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Expected angle

  • #1

Homework Statement



A grating has exactly 7000 lines uniformly spaced over 2.67 cm and is illuminated by light from a mercury vapor discharge lamp. What is the expected angle for the third-order maximum of the green line ( = 546 nm)?

Homework Equations



?

The Attempt at a Solution



no idea :(
 

Answers and Replies

  • #2
rl.bhat
Homework Helper
4,433
5
Try to find out the relevant equation for diffraction grating.
 

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