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प्रश्न
Select the correct alternative.
The natural source of light is
विकल्प
candle flame
electric lamp
sun
kerosene lamp
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उत्तर
sun
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संबंधित प्रश्न
Write true or false of the following statement.
We can see an object through an opaque medium.
Differentiate between the luminous and non-luminous bodies. Give two examples of each.
Explain the difference between a transparent, a translucent, and an opaque medium. Give two examples of each.
What do we call a substance through which light passes? Give an example of such a substance.
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.
The angle of deviation of light ray in a prism depends on the angle of ______.
State Rayleigh’s law of scattering.
Why are traffic signals red in colour?
A ray of the light incident along normal to the mirror ______ its path.
Observe the picture given in the following figure carefully.
A patch of light is obtained at B, when the torch is lighted as shown. Which of the following is kept at position A to get this patch of light?
