what is the distance between the first-order violet and the first-order red fringes?
White light spans the wavelength range between about 400 nm and 700 nm.
If white light passes through two slits
0.772 mm apart and falls on a screen 1.8 m
from the slits, what is the distance between
the first-order violet and the first-order red
fringes?
Answer in units of mm
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How long is a piece of string? & What is the distance between the ends?
d sin(theta) = n lambda
sin(theta) = y/D
d= slit separation
n=0,1,2,3....is 1 for first order
y=distance for center max
D=screen distance
lambda = wavelength
Compute y for each lambda then take the difference.