| The diagram shows a ray of light reflected at a plane mirror. |
| Which pair of the angle of incidence and angle of reflection is correct? |
|
A)
Angle of Incidence
Angle of reflection
\[\text{30 }\!\!{}^\circ\!\!\text{ }\]
\[\text{30 }\!\!{}^\circ\!\!\text{ }\]
B)
Angle of Incidence
Angle of reflection
\[\text{30 }\!\!{}^\circ\!\!\text{ }\]
\[\text{60 }\!\!{}^\circ\!\!\text{ }\]
C)
Angle of Incidence
Angle of reflection
\[\text{60 }\!\!{}^\circ\!\!\text{ }\]
\[\text{30 }\!\!{}^\circ\!\!\text{ }\]
D)
Angle of Incidence
Angle of reflection
\[\text{60 }\!\!{}^\circ\!\!\text{ }\]
\[\text{60 }\!\!{}^\circ\!\!\text{ }\]
Correct Answer: A
Solution :
By the geometry of figure angle of incidence \[\text{=30 }\!\!{}^\circ\!\!\text{ }\]. According to first law of reflection, the angle of incidence is equal to the angle of reflection.
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