Answer:
The angle of refraction Ø2 equals 62.95° ≈ 63°
Explanation:
The relationship between the angles of incidence and
refraction , with respect to light or other waves passing through two different substances or media, such as glass, water or air is given by Snell's Law.
Snell's Law states that the when light travels from one medium to another, it generally refracts.
It is given by the mathematical expression;
[SinØ1°/SinØ2°] = [n2/n1]
Cross multiplying, we have;
n1 × SinØ1° = n2 × SinØ2°
where, n is the indices of refraction of each substance
Ø is the angle between the ray and the line normal to the surface.
Given the following values;
n1 = 1.36 n2 = 1.31 Ø1 = 30° Ø = ?
n1 × SinØ1° = n1 × SinØ2°
SinØ2° = [n1 × SinØ1°]/n2
substituting the values respectively;
SinØ2° = [1.36 × Sin30°]/1.31
SinØ2° = [1.36 × 0.5]/1.31
SinØ2° = 0.68 × 1.31
SinØ2° = 0.8906
Ø2° = Sin–¹(0.8906)
Ø2° = 62.95° ≈ 63°
