First slide

Refraction of light

Question

A light wave has a frequency of $4 \times 10^{14}$ Hz and a wavelength of $5 \times 10^{- 7}$ meters in a medium. The refractive index of the medium is

Moderate

A

1.5
B

1.33
C

1.0
D

0.66

Solution

$μ = \frac{c}{v} = \frac{c}{f λ} = \frac{3 \times 10^{2}}{4 \times 10^{14} \times 5 \times 10^{- 7}} = 1 .5$

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