Question

Which part of a plane mirror is responsible for reflection?

• A. Silver polish
• B. Glass
• C. Opaque paint at the back
• D. Both glass and silver polish

Answer 1

The correct option is A Silver polish

In a mirror, only the silver polished surface is responsible for reflection. The glass is there to protect the reflecting surface and provide a smooth surface to ensure regular reflection. The back paint is there to protect the reflecting surface from the back and trap more light. Even if there is no glass or back coating, the polished surface would reflect perfectly.