November 27, 2015

Homework Help: Physics -Interference & Diffraction

Posted by Christina on Friday, April 11, 2008 at 4:03pm.

Given Information: Light of wavelength 631 nm passes through a diffraction grating having 485 lines/mm.

Part A: What is the total number of bright spots (indicating complete constructive interference) that will occur on a large distant screen?
*Answer: 7 (this is correct)

Part B: What is the angle of the bright spot farthest from the center?
*Answer: ???
-I am not sure what equation to use for this part of the problem....

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