A soap bubble (n = 1.35) floating in air has the shape of a spherical shell with

Question

A soap bubble (n = 1.35) floating in air has the shape of a spherical shell with a wall thickness of 104 nm.

(a) What is the wavelength of the visible light that is most strongly reflected?

________nm

(b) Explain how a bubble of different thickness could also strongly reflect light of this same wavelength.

(c) Find the two smallest film thicknesses larger than 104 nm that can produce strongly reflected light of the same wavelength. (Enter your answers from smallest to largest.)

__________nm

__________nm

Explanation / Answer

use formula 2tn=m*lemda+lemda/2. in our ase m=0

2*104*1.35= 0+lemda/2

(a) lemda(wavelength)= 562nm , when perfectly reflected

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