Question

Suppose you are in a dark room. Can you see objects in the room? Can you see objects outside the room? Explain.

Answer 1

Recall the condition to see any object. Assume the absence of light to answer this question. The image of the object we see forms on the retina of our eye.

Complete step by step answer:
Light is an electromagnetic radiation that originates from any light source. This light gets reflected if incident on any object.
You cannot see the object in the dark room. We know that we can see an object only when the light reflected from that object falls on the retina of our eye. In the dark room, there is no source of light. Therefore, the light from the object does not fall on the retina of our eye. Therefore, we cannot see the object in the dark room.

You can see the object outside the dark room. When we are in the dark room and the light present outside the room, the light reflected from the object travels in all the directions. The reflected light will surely reach our eye and therefore we can see that object.

Note:
We should know that light is everywhere and sunlight can directly or indirectly reach there. In space, there is presence of light but there is no reflecting surface nearby which can reflect the light. Therefore, the space we see is dark. If there is a spaceship in space, we can see the spaceship because the spaceship will reflect the light towards our eyes.