1. Dr Ajay sometimes uses a mirror on his forehead to examine the internal parts the ear ,nose, throatetc. What type of mirror do you think it is? Explain it by giving reason for your answer.
2. Class 8 boys are given three Mirrors one of which is is a plane mirror, the second a convex mirror and the third a concave one. How can you decide "which is which" by looking at the image of your face in them from a closed position?
3. Give reasons for the following:
A. A pond of water appears shallower than it actually is.
B. A Pencil appear bent when dipped partially in a beaker containing water.
4.what will you observe when a pencil is completely submerged in a glass full of water. Will it slightly bent or it will appear straight? Give Reason in support of your answer.
5.Md. sharib moves towards a plane mirror with a speed of 5m/s. How fast is his image moving towards him?
6. An object P is kept at a distance of 25 cm from a concave mirror of focal length 15cm. Where its image will be formed?
7. Generally During morning and evening time, why does sky appears to be Orange- red coloured?
8. What do you mean by Dispersion of light? Explain it with the help of a suitable diagram. What will happen if we pass a monochromatic Ray of light through a prism, will it under go dispersion and split into its constituent colours?
9. Draw a ray diagram in which an upright and magnified image will be formed in a concave mirror. Where Such Mirrors are used in our day to day life?
10. What do you mean by mirage? Explain its occurence with the help of a a suitable diagram. Is it anything to do with the total internal reflection?
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