- #1
Prophet029
- 11
- 0
Homework Statement
What is the thinnest film of MgF2 (n=1.21) on glass that produces a strong reflection for the light with a wavelength of 531 nm?
Homework Equations
Open-Closed Standing wave
Fn= (nv/4L)
v = Wave Length * F
The Attempt at a Solution
Basically, I tried to plug in the data. I solved for Frequency by using velocity for light (300,000,000 m/s) = (5.31*10^-7m) * F
Then used the equation Fn= (nv/4L)
using n = 1.21
Alternatively the eq can be simplified into
L= ((n*wave length)/4)
I get 1.606*10^-7m, but I get the problem wrong. I think I overlooked something, but I'm not sure, can anyone help out. Most appreciated.