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woaini
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Homework Statement
A double slit apparatus is illuminated 730 and 558 nm wavelengths. They form a two-colored interference pattern on a measuring screen located at a distance of 2.28 m from the slits. The slit separation is 42 wavelengths of 730 nm light.
(a) What order (m) intensity maximum for λ = 730 nm light occurs near a distance of y = 0.205 m away from the central zeroth order?
(b) What order maximum for 558 nm light lies closest to this order?
λ1=730
λ2=558
L=2.28
m=?
d=42*730
Homework Equations
mλ=dsinθ
tanθ=y/L
The Attempt at a Solution
tanθ=.205/2.28 θ=5.14
a) m=(dsinθ)/λ = 3.76 (4?)
a) m=(dsinθ)/λ = 4.92 (5?)
So did I get the slit separation right? Are my orders suppose to be decimal numbers and do I round up or down?