A ray of light is incidenting normally on a plane mirror. The angle of reflection will beSelect an answerA0°B90°CWill not be reflectedDNone of the above

Break Down the Problem

1. Identify the scenario: A ray of light is incident on a plane mirror normally (perpendicularly).
2. Understand the properties of reflection: Specifically, the law of reflection states that the angle of incidence is equal to the angle of reflection.

Relevant Concepts

• Law of Reflection: This law states: $\theta_i = \theta_r$ where $\theta_i$ is the angle of incidence and $\theta_r$ is the angle of reflection.
• When light is incident normally (perpendicularly) to a surface, the angle of incidence $\theta_i$ is $0°$.

Analysis and Detail

1. Since the ray is incidenting normally on the mirror, we have: $\theta_i = 0°$
2. Applying the law of reflection: $\theta_r = \theta_i = 0°$
3. Therefore, the angle of reflection is also $0°$.

Verify and Summarize

The calculations are consistent with the law of reflection. Since the angle of incidence is $0°$, the angle of reflection must also be $0°$.

Final Answer

The angle of reflection will be A) 0°.