A Sodium Light,having Wavelength 589

question 32

Multiple Choice

A sodium light,having wavelength 589.3 nm,is used to view a soap film to make it look black when directed perpendicular to the film.What is the minimum thickness of the soap film if the index of refraction of soap solution is 1.38?

• A)114 nm
• B)194 nm
• C)294 nm
• D)314 nm
• E)214 nm

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Definitions:

Down

a direction towards a lower position or a lower point on a scale.

Quadri-

A prefix meaning "four," used in medical terms to signify four parts or quadruple.

Extra-

A prefix meaning outside, beyond, or in addition to.

Inside

The inner part or space of something.