Wave Optics

1. The problem statement, all variables and given/known data
An oil film (n = 1.45) floating on water is illuminated
by white light at normal incidence. The film is 280 nm
thick. Find (a) the color of the light in the visible spectrum
most strongly reflected and (b) the color of the
light in the spectrum most strongly transmitted. Explain
your reasoning.

2. Relevant equations


Where t is thickness and m is the order number.

3. The attempt at a solution

I don’t understand part b. I must have dozed off in class (it’s an 8am class, don’t judge!). How exactly would I go about determining this?


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