1. Gasoline is a colorless liquid. (a) Discuss how it is that a thin layer of...

1. Gasoline is a colorless liquid.

(a) Discuss how it is that a thin layer of gasoline on water displays many different colors?

b) The index of refraction of the gasoline is 1.42 and of water is 1.33. At what thickness of the oil, d, will light of wavelength λ=600 nm have the first interference maximum?

Expert Solution

(a) The thin layer of gasoline displays different colours due to the interference between the light waves reflected from the oil surface and from the interference between oil and water.

(b)

For the first maxima we have the equation

where n is the refractive index of gasoline=1.42, t is the thickness of the film, is the wavelength of light

=

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genius_generous answered 2 years ago

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