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Question: 

A physics professor wants to perform a lecture demonstration of Young’s double-slit experiment for her class using the 633-nm light from a He–Ne laser. Because the lecture hall is very large, the interference pattern will be projected on a wall that is 5.0 m from the slits. For easy viewing by all students in the class, the professor wants the distance between the m = 0 and m = 1 maxima to be 35 cm. What slit separation is required in order to produce the desired interference pattern?

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

Quick Answer: 

$9.0 \; \mu m$

Giancoli 7th Edition, Chapter 24, Problem 10

(2:12)

Chapter 24, Problem 10 is solved.

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