Name the muscles attached to the eye lens that make it thicker to see objects. Name the property on which working of kaleidoscope is based. Name the point where the optic nerve leaves the retina.

LIGHT

1. What is persistence of vision?
2. What is accommodation? Explain.
3. What is dispersion of light? How it is caused?
4. List the characteristics of image formed by the plane mirror.
5. Name the muscles attached to the eye lens that make it thicker to see objects.
6. Name the property on which working of kaleidoscope is based.
7. Name the point where the optic nerve leaves the retina.
8. Define light and reflection of light.
9. Write the laws of reflection of light.
10. Define angle of reflection, angle of incidence and normal.
11. What is Braille system? Who invented it?
12. What is cataract?
13. Give difference between regular and irregular reflection.
14. Can we see objects by having eyes only? Comment.
15. Differentiate between real and virtual image.
16. How transparent, translucent and opaque objects are different?
17. What is lateral inversion?
18. Describe the structure of human eye. Draw diagram.
19. How is a visually challenged person can read and write? What are the helpful optical aids that can be provided to them?

20.  What is the speed of light in the vacuum?

1. Name the defects of vision? How they can be corrected?
2. Draw ray diagrams to show image formation by a convex lens when:

a)     The object is placed at 2F

b)     The object is between F and 2F

c)      The object is beyond 2F

d)     The object is at infinity\

e)     The object is at F

f)       The object is between F and pole.

1.  What will be the angle of incidence if angle of reflection is 39.
2. Which is the light sensitive layer of an eye?
3. What are rods and cones?
4. What is spectrum?
5. Name the part of the eye that regulates the amount of light entering the eye.
6. Night birds have ______ rods than cones in their eye.
7.  What type of image is formed by a plane mirror?

30.   Name any two popular physically challenged personalities of India.