   Chapter 27, Problem 70PE

Chapter
Section
Textbook Problem

A soap bubble is 100 nm thick and illuminated by white light incident perpendicular to its surface. What wavelength and color of visible light is most constructively reflected assuming the same index of refraction as water?

To determine

Wavelength and color of reflected light

Explanation

Given info:

Thickness of the soap bubble, t=100nm=100×109m

Refractive index of water, n=1.33

Formula used:

Thickness of the film producing constructing interference is calculated by the formula

t=λ4n

Here,

λ is the wavelength of the reflected light

n is the refractive index

t is the thickness of the film producing interference

Calculation:

The wavelength of the reflected light is calculated by the formula

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