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प्रश्न
Name a few living things which emit light.
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उत्तर
Jugnu and firefly.
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संबंधित प्रश्न
Fill in the blank.
Light travels in a ................. path.
What is light? Define it.
Why do objects in a room become visible even if sunlight does not enter it?
Fill in the blank
Speed of light in vacuum is .................
Answer the following.
List four natural 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 |
Velocity of light is greater in denser medium than in rarer medium
Why are traffic signals red in colour?
Boojho made light from a laser torch fall on a prism. Will he be able to observe a band of seven colours? Explain with a reason.
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?
