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प्रश्न
List two artificial sources of light.
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उत्तर
Electric bulb, torch, an oil lamp, fluorescent tube, candle.
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संबंधित प्रश्न
Name two natural sources of light.
What do you understand by candle power?
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Write true or false
The earth has its own light.
Answer the following.
What is light?
_______ is the natural source that stimulates sight and makes things visible.
Choose the translucent substance from the following
Speed of light in air is 3 × 108 m s–1 and the refractive index of a medium is 1.5. Find the speed of light in the medium.
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 ray of the light incident along normal to the mirror ______ its path.
