Any object that gives out light is called a source of light. Sources of light can be natural or artificial (man made).
Depending on the size a source of light can be a point source or an extended source.
S.No. | Point Source | Extended Source |
1 | A source of light that is of the size of the head of a pin. | A source of light which is bigger than the point source of light is called extended source of light. |
2 | Light rays travel in all direction from the point source in a straight line | Light rays travel in all direction from all the points of an extended light source in a straight line |
3 |
A particular source of light is either hot or clod depending upon the way the light is produced.
Which of the following is (are) man made sources of light ? | |||
Right Option : D | |||
View Explanation |
Which of the following are correct ? (a) A source of light that is of the size of the head of a pin is called point source. (b) A source of light which is bigger than the point source of light is called extended source of light. (c) The sources which emit light even when they are cold are called cold sources of light. | |||
Right Option : A | |||
View Explanation |
A student was asked to observe the night sky and note down various objects observed by him in his nots book. He listed the following objects: (i) Stars (ii) Moon (iii) Clouds From the above the sources of light in night sky are __________ | |||
Right Option : D | |||
View Explanation |
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