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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
Write true or false of the following statement.
Light travels in a straight-line path.
Write the names of some cold light-emitting objects.
Tick the correct answer.
A tube light is a
Tick the correct answer
Glass is
Fill in the blank
The brightness of light is measured in ...................
Answer the following.
What is meant by luminous intensity? What is one lumen?
Answer the following.
Differentiate between luminous and non-Luminous objects.
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.
When a beam of white light passes through a prism it gets ______.
List any five properties of light.
