In a room, lighted by an electric bulb, it is found that the shadow of the ceiling fan hung in the centre is falling on the wall opposite to the door. What can you say about the position of the bulb ?

Foundation

Physics Foundation

Reflection from plane mirror

Light

Question

In a room, lighted by an electric bulb, it is found that the shadow of the ceiling fan hung in the centre is falling on the wall opposite to the door. What can you say about the position of the bulb ?

A

On the wall on your right as you enter the room

B

On the wall having the door

C

On the wall facing the door

D

On the wall on your left as you enter the room

LiveFree JEE Main Previous Year Online Papers Live Free JEE Advance Previous Year Online Papers

JEE Advance

College PredictorLive

Know your College Admission Chances Based on your Rank/Percentile, Category and Home State.

Get your JEE Main Personalised Report with Top Predicted Colleges in JoSA

The shadow of the fan is cast on the wall opposite the door. For a shadow to form, the bulb must be between the fan and the wall where the shadow appears. Since the fan is in the center, the bulb must be on the same side as the door to cast the shadow away from it. Therefore, the bulb is on the wall with the door.

Final Answer: On the wall having the door