Light

Light Worksheet-4

11. Boojho stands at A just on the side of a plane mirror as shown in Fig. 16.11. Can he see himself in the mirror? Also can he see the image of objects situated at P, Q and R?

12. What makes things visible?

13. Can you see an object in the dark?

14. What is mirror?

15. What kind of image is formed by a plane mirror?

Light Worksheet-5

31. What is the coloured part of eye called?

32. What is the working of iris?

33. Where the image is formed in eyes?

34. Which part of eyes sends the sensation felt?

35. How many kinds of nerve cells are there in eyes?

36. Which is responsible for bright light and colour in our eyes ?

37. Which is responsible for dim light in our eyes?

Light Worksheet-6

51. What are the uses of kaleidoscope?

52. Define dispersion of light.

53. Give an example of natural dispersion.

54. What is the function of rods and cones in our eye?

55. What is blind spot?

56. What is the function of eyelids.

57. What is the Braille system?