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प्रश्न
Fill in the blank
Speed of light in vacuum is .................
उत्तर
Speed of light in vacuum is 300000 km/sec
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संबंधित प्रश्न
Select the correct alternative.
The natural source of light is
What is a transparent medium? Give two examples.
Tick the correct answer.
Light causes
Answer the following.
Distinguish between transparent, translucent, and opaque objects.
A ______ is a natural source of light.
Match the following.
| Group A | Group B |
| (a) Mirror | (1) Non-luminous |
| (b) Firefly | (2) Inverted image |
| (c) Pinhole camera | (3) Reflection |
| (d) Moon | (4) Luminous |
Light travels only in a______ It is because of this property that______ are formed.
Light is a form of energy and it travels in a straight line.
Look at the figure given in Fig. 11.8
Will there be any difference in the shadow formed on the screen in A and B.
Using a pinhole camera a student observes the image of two of his friends, standing in sunlight, wearing yellow and red shirt respectively. What will be the colours of the shirts in the image?
