1. The amount of light entering the eye is controlled by

2. In case of reflection of light, the angle of incidence (i) and the angle of reflection (r) are related as

3. An owl can see clearly at night but not day time because it has

4. The defect due to which a person is not able to see the distant objects clearly

5. Myopia can be corrected by using a

6. Light passing through a prism splits into seven colours. This is called

7. When we stand in front of our dressing table, our left hand seems to be right and right seems to be left. This is called

8. The image formed by a camera and a simple microscope are respectively

9. Which one of the following statements is correct regarding rods and cones in the human eye?

10. If the angle of incidence of light falling on a plane mirror is 30°, what will be the angle of reflection?

11. The splitting of white light into its seven constituent colours is called

12. Light enters the eye through

13. Rainbow is a natural phenomenon showing

14. Name the type of mirror used as a backview mirror.

15. Front balged part of the eyeball is called

16. Visually impaired people can read and write using

17. Beam of light striking the reflecting surface is called

18. A smooth shining surface, which rebounds the light back in same or in different direction, is called

19. Band of seven colours is called

20. What is the angle of incidence of a ray if the reflected ray is at an angle of 90° to the incident ray?