Question
A wall reflects light and a mirror also reflects light. What difference is there in the way they reflect light?
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Answer
Reflection of light from a wall is diffused reflection because the surface of the wall is uneven so the light is reflected in different directions and also the reflected rays are not parallel. Reflection of light from a mirror is regular reflection because the surface of mirror is an even surface which is polished. The light gets reflected from the mirror surface in one particular direction and the reflected rays are all parallel.
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Q.1. What kind of force is applied by a batsman on a ball while hitting it?
(a) Magnetic Force
(b) Muscular Force
(c) Frictional Force
(d) Gravitation Force
Q.2. Force can be defined as:
(a) Work done
(b) Energy required to do work
(c) Push or Pull
(d) Push only
Q.3. In the given example of a volleyball game, what changes in force were brought about on the volleyball?
(a) Change in direction of motion
(b) Change in shape
(c) Change in state of motion
(d) Both Option (a) and (c)