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प्रश्न
Name two natural sources of light.
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उत्तर
- Sun
- Stars
- Firefly
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संबंधित प्रश्न
Fill in the blank
A medium through which light cannot pass is called the ....................
What do we call an electric bulb producing light?
Does the flame of a gas stove emit light?
What do you understand by candle power?
Tick the correct answer.
Light is a font of
Fill in the blank
Light consists of .............. colours.
Answer the following.
What is meant by luminous intensity? What is one lumen?
A ray of light passes from one medium to another medium. Refraction takes place when angle of incidence is ______.
Velocity of light is greater in denser medium than in rarer medium
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?
