Concept explainers
(a)
The angle between the refracted ray and the glass surface.
(a)
Answer to Problem 77P
The angle
Explanation of Solution
The angle of between the incident ray and the glass surface is
Write the expression for Snell’s law
Here,
Substitute
Rewrite
Solve for
Thus, the angle
(b)
The critical angle between glass and air.
(b)
Answer to Problem 77P
The critical angle between glass and air is
Explanation of Solution
Write the expression for critical angle between glass and air using Snell’s law
Here,
Rearrange for
Substitute
Thus, the critical angle between glass and air is
(c)
The path of light.
(c)
Answer to Problem 77P
The light follows path
Explanation of Solution
The angle of incidence at the bottom horizontal surface is same as
Since the angle of incidence is greater than the critical angle, the ray undergoes total internal reflection at the surface and hence there is no transmitted ray.
Thus, the light follows path
(d)
The angle
(d)
Answer to Problem 77P
The angle
Explanation of Solution
The light doesn’t follow path
Write the expression for the angle
Rearrange for
Substitute
Thus, the angle
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Chapter 23 Solutions
PHYSICS
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