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Question: 

A parallel beam of light from a He–Ne laser, with a wavelength 633 nm, falls on two very narrow slits 0.068 mm apart. How far apart are the fringes in the center of the pattern on a screen 3.3 m away?

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

Quick Answer: 

3.1 cm

Giancoli 7th Edition, Chapter 24, Problem 9

(2:36)

Chapter 24, Problem 9 is solved.

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