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Question: 

If 680-nm light falls on a slit 0.0425 mm wide, what is the angular width of the central diffraction peak?

Source: Giancoli, Douglas C., Physics: Principles with Applications, 7th Edition, 2014.

Quick Answer: 

$1.8^\circ$

Giancoli 7th Edition, Chapter 24, Problem 21

(1:19)

Chapter 24, Problem 21 is solved.

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