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प्रश्न
What do we call an electric bulb producing light?
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उत्तर
Artificial source of light.
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संबंधित प्रश्न
Write true or false of the following statement.
Light travels in a straight-line path.
Fill in the blank.
The sun is a ............... source of light.
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
List two artificial sources of light.
Write the names of some cold light-emitting objects.
Fill in the blank
Speed of light in vacuum is .................
Light travels only in a______ It is because of this property that______ are formed.
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.
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.
