1. Visually impaired people can read and write using

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

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

4. Beam of light striking the reflecting surface is called

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

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

7. Band of seven colours is called

8. Light enters the eye through

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

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

11. Myopia can be corrected by using a

12. 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

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

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

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

16. Front balged part of the eyeball is called

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

18. Rainbow is a natural phenomenon showing

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

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