1. A person is sitting on a chair in a dark room near one of the walls. A big mirror is hung on the wall facing the person. When a torch light is put on the person from a distance, then we can see P of of the the person on the wall behind him . At the same time Q of the person can be observed in the mirror on the wall.
A. What is P ?
B. What is Q?
C. State one way in which P differs from Q.
2. State the colour of Red shirt in a room illuminated by a green light only. Give reason for your answer.
3. Man moves towards a plane mirror with a speed of 4 metre per second. How fast is his image moving towards him?
4. Explain the observed colours of
A. a cyan object in yellow light
B. a red object in Magenta light
5. What do you understand by a pigment? Explain it with an example.
6 . Why "ambulance" is written reverse on the ambulance vehicle?
7. A person is standing 1.7m away in front of a plane mirror. Where is the image formed? How much is the distance between him and the image.
8. Explain both types of reflection of light with the help of a suitable example.
9. How will you prove that light is composed of seven colours?
10. The angle formed between a reflecting surface and the reflected ray is 20 degree. Find angle formed between incident ray and the reflected ray?
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