(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A screen is illuminated by monochromatic

light.

The distance from the slits to the screen is

7.4 m.

What is the wave length if the distance from the central bright region to the fourth

dark fringe is 2.6 cm.

Answer in units of nm.

2. Relevant equations

x=L*tan(theta)

sin(theta)=(m+.5) lambda/d

3. The attempt at a solution

theta= inverse tan( 2.6e-2 / 7.4) = .201309

lambda = (.55e-3) sin(.201309) / 4.5 = 429.427 nm

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# Homework Help: Youngs slits

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