Available Answers

1. 1.

   What are luminous objects? Give two examples.

2. 2.

   How do we see nonluminous objects?

3. 3.

   What helps us see a stream of light entering through a gap in the curtains of a room?

4. 4.

   What is a shadow?

5. 5.

   What is a lunar eclipse?

6. 6.

   Define reflection.