1. we often see bright circular patches of light on the ground under a tree on a sunny day.expain it.
2.what inference do you get from the fact that when an object is placed in the path of light a shadow is formed behind the object?
3. The image formed in a pinhole camera is inverted. why.Explain it.
4. Write any two observations from everyday life which show that light travel in a straight line.
5. Explain why we are able to to see the table and chair in a room during daytime?
6. Classify the given objects into Luminous and non luminous objects:
Meteor,planets,mirror,firefly,electric bulb,moon,chair,star,jelly fish,match stick.
7. Explain the type of shadow we expect to get when we have an Opaque object before a source of light very much bigger than the object with the help of suitable diagram.
8. We do not see any Shadow of a bird flying high up in the sky. Why? Explain it with the help of a suitable ray diagram.
9. When an apple is put in front of a small lighted up bulb, the shadow of the Apple appears on a plain white sheet kept behind the Apple. What according to you are the likely changes in the appearance of the shadow as the paper sheet is gradually moved farther and farther away from the combination of the the bulb and the Apple. Give the reason for your answer.
10. Explain why lunar eclipse takes place only on full moon day?
Yes sir
ReplyDelete