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प्रश्न
Answer the following.
Write down five man-made sources of light.
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उत्तर
Electric bulb, torch, an oil lamp, fluorescent tube, candle.
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संबंधित प्रश्न
Match the following columns
| Column A | Column B |
| a. Wooden block | i. new moon's day |
| b. Sun | ii. rectilinear propagation of light |
| c. Umbra | iii. opaque body |
| d. Eclipse | iv. luminous body |
| e. Solar eclipse | v. complete dark park |
Select the correct alternative.
The luminous body is
What do we call an electric bulb producing light?
Does the flame of a gas stove emit light?
Tick the correct answer.
Light causes
________ objects allow all the light to pass through them.
State whether true or false. If false, correct the statement.
If a ray of light passes obliquely from one medium to another, it does not suffer any deviation.
State Rayleigh’s law of scattering.
State whether the following statement is True or False.
An object can be seen only if it emits light
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.
