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प्रश्न
Fill in the blank
Speed of light in vacuum is .................
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उत्तर
Speed of light in vacuum is 300000 km/sec
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संबंधित प्रश्न
Write true or false of the following statement.
The moon is a natural source of light.
Fill in the blank.
The sun is a ............... source of light.
Select the correct alternative.
The natural source of light is
What do we call a substance through which light passes? Give an example of such a substance.
Why do objects in a room become visible even if sunlight does not enter it?
Tick the correct answer.
Light is a font of
Tick the correct answer.
The natural source of light is
Answer the following.
Write down five man-made sources 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 |
A student observes a tree given in the following figure through a pin hole camera. Which of the diagrams given in the following figure (a) to (d), depicts the image seen by her correctly?
