Question

Kamini's store room has only one electric bulb and she finds it a little dark. She wants to fit
an extra bulb. Her husband John suggests that he will instead fit mirrors on the walls of the
store room. Will John's idea work?
A. Yes, though it will only feel brighter, the room will not actually become brighter.
B. Yes, the mirrors will reflect light, actually making the room brighter.
C. No, without adding a light source, the room cannot be brightened.
D. No, due to the reflections of the other objects, the room will become less bright.​

Answer 1

Reflection

B. Yes, the mirrors will reflect light, actually making the room brighter.

When mirror will be in the store , it starts reflecting light falling on it from the bulb, and when several mirror gets there, light from  bulb acts as source light which further acts as incident light for mirror and mirror will reflect it as reflected light and so on. The room will get brightened up using this technique.

Reflection of light: When a ray of light approaches a smooth polished surface and the light ray bounces back, it is called the reflection of light.

Note: Mirror with silver polish at back reflects around 96% of rays falling on it.