Question

5. If the angle of incidence for a ray of light is 40°, then its angle of reflection will be
a)20°
b. 80°
c. 40°
d. 0°​

Answer 1

Answer:

40° (Option C)

Explanation:

Angle of reflection will be 40°.

Reason : Second law of reflection states that the angle of incidence is always equal to the angle of reflection. Thus, if the angle of incidence is 40°, so the angle of reflection will also be 40°.

$\rule{200}2$

Reflection :

• Reflection is defined as the bouncing back of light when a ray of light strikes the surface.

Laws of reflection :

• According to first law of reflection; the normal, the incident ray and and the reflected ray lie on the same plane at the point of incidence.

• According to the second law of reflection; the angle of incidence and the angle of reflection are always equal.

$\longmapsto \bf{ \angle i = \angle r}$