Question

The ratio of sine of angle of incidence in water to the sine of angle of incidence in air is 0.75. The \({}^{a}\mu_{w}\) is:

Options

• 1.30

• 1.31

• 1.28

• 1.33

Answer 1

1.33

Explanation:

The given ratio is the reciprocal of the refractive index of water with respect to air.

Thus, $$ {}^{a}\mu_{w}=\frac{1}{0.75}=1.33$$