Question

What happens when you throw a ray of light on the mirror along the normal?

• A. The ray that comes after reflection makes ${60}^o$ with the mirror
• B. The incident ray do not come back
• C. The incident ray retraces its path
• D. None of the above

Answer 1

Answer: (C)

The incident ray retraces its path

When a ray is incident normally on a surface, after reflection, it retraces its path. The angle of incidence and that of reflection are both $0^0$ in this case.