A ray of light strikes a sheet of glass (n=1.5) at an angle of 25° with the normal. Find the angle of the refracted ray within the glass with respect to the normal. (a) 56° (b) …

Question

asked Jun 17, 2020 140k views

1 Answer

Sunday Ikpe · Answer 1 · 2020-06-24T07:57:54+0000

Answer:

(d) 16°

Step-by-step explanation:

Using Snell's law as:

$n_i* {sin\theta_i}={n_r}*{sin\theta_r}$

Where,

${\theta_i}$ is the angle of incidence ( 25.0° )

${\theta_r}$ is the angle of refraction ( ? )

${n_r}$ is the refractive index of the refraction medium (glass, n=1.5)

${n_i}$ is the refractive index of the incidence medium (air, n=1)

Hence,

$1* {sin25.0^0}={1.5}*{sin\theta_r}$

Angle of refraction =
sin^(-1)0.2817 = 16°