Light is incident on an air glass boundary at an angle of incidence of 400. If the refractive index of the glass is 1.7, determine the angle of refraction

Snell's Law describes the relationship between the angles of incidence and refraction when light passes between two different media.

where:
$n_1$ is the refractive index of the first medium (air)
$\theta_1$ is the angle of incidence
$n_2$ is the refractive index of the second medium (glass)
$\theta_2$ is the angle of refraction

Refractive index of air, $n_1 = 1$ (approximately)
Angle of incidence, $\theta_1 = 40°$
Refractive index of glass, $n_2 = 1.7$
Angle of refraction, $\theta_2 = ?$

Calculate $\sin(40°)$:

Divide by 1.7:

To find $\theta_2$, take the inverse sine (arcsin):

The angle of refraction is approximately 22.22°.