The discussion focuses on calculating the wavelength of light most strongly transmitted through a thin film of magnesium fluoride (n = 1.71) on a camera lens (n = 1.29) with a thickness of 87.0 nm. The initial calculation using the formula λ = 2nt/m resulted in an incorrect wavelength of 297 nm. The error lies in the application of the formula, specifically in not considering the phase change upon reflection at the boundaries of different refractive indices.
PREREQUISITESStudents studying optics, physics educators, and professionals involved in optical engineering or lens design will benefit from this discussion.
Look at how the refractive indices are related at each surface.xamy said:Homework Statement
A camera lens (n = 1.29) is coated with a thin film of magnesium fluoride (n = 1.71) of thickness 87.0 nm. What wavelength in the visible spectrum is most strongly transmitted through the film?
Homework Equations
λ = 2nt/m
The Attempt at a Solution
λ = 2(1.71)(87E-9m)/(1) = 297 nm
Answer is not correct. Please point out the mistake. Thanks