A ray of light is incident on a pane of common window glass at an angle of 35° to the normal. The angle of the reflected ray with respect to the normal is
A)35°
B)55°
C)90°
D)20°
And the refracted ray within the glass may be at an angle of
E)35°.
F)55°.
G)22°.
H)75°.

Question

Quizplus · Accepted Answer

The angle of incidence is equal to the angle of reflection, so the reflected ray is at an angle of 35° to the normal. The angle of refraction can be calculated using Snell's law: n1 * sin(theta1) = n2 * sin(theta2), where n1 is the index of refraction of the first medium (air), theta1 is the angle of incidence, n2 is the index of refraction of the second medium (glass), and theta2 is the angle of refraction. The index of refraction of air is approximately 1, and the index of refraction of glass is approximately 1.5. Plugging these values into Snell's law, we get sin(theta2) = (1/1.5) * sin(35°) = 0.375. Taking the inverse sine of this value, we get theta2 = 22°.

A Ray of Light Is Incident on a Pane of Common