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2 years ago

11

A thin beam of light enters a thick plastic sheet from air at an angle of 32.0° with the normal and continues in the sheet at an

angle of 23.0° with the normal. What is the index of refraction of the plastic?

1 answer:

Cloud [144]2 years ago

5 0

Answer:

1.36

Explanation:

$n_{air}$ = Index of refraction of air = 1

$n_{plastic}$ = Index of refraction of plastic = ?

i = angle of incidence in air = 32.0° deg

r = angle of refraction in plastic = 23.0° deg

Using Snell's law

$n_{air}$ Sini = $n_{plastic}$ Sinr

(1) SIn32.0 = $n_{plastic}$ Sin23.0

$n_{plastic}$ = 1.36

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<em><u>Considering the density & specific heat capacity of coffee to be equal to that of water.</u></em>

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