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

White light spans the wavelength range be-

tween about 400 nm and 700 nm.

If white light passes through two slits

0.656 mm apart and falls on a screen 1.7 m

from the slits, what is the distance between

the first-order violet and the first-order red

fringes?

Answer in units of mm.

2. Relevant equations

sin(theta) = m*lambda / d

x = L*tan(theta)

3. The attempt at a solution

I used the first equation to solve for theta for both red light (lambda = 700 nm) which gave theta = .061139 and violet light (lambda = 400 nm) which gave theta = .034936. I used the second equation to plug in theta and solve for x for each of them. I then subtracted the x value of violet from the x value for red and converted to mm. My final answer was 6.781 mm.

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# Homework Help: Double slit and colored wavelength

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