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Question: 

A grating has 74000 slits/cm. How many spectral orders can be seen (400 to 700 nm) when it is illuminated by white light?

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

Quick Answer: 

only 1 complete spectral order can be seen on each side of the central max

Giancoli 7th Edition, Chapter 24, Problem 34

(3:18)

Chapter 24, Problem 34 is solved.

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