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NewtonianAlch
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Homework Statement
Light of wavelength 470 nm passes through a block of material with a refractive index n = 1.30, some of it is reflected off the air-block boundary and some of it is transmitted through air (n=1.00) with thickness t, and is then reflected off another block also with n = 1.30.
What is the minimum thickness, t, for which you will observe:
Constructive interference
Destructive intereference
Homework Equations
t = (m+1/2)*lamda / 2n
t = m*lamda / 2n
The Attempt at a Solution
m would be 0 since it's asking for minimum thickness, therefore destructive interference would always be zero wouldn't it?
I'm a bit confused because another book has the equation:
t = (m + 1/2)*lamda / 2 <- what happened to the refraction index?