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प्रश्न
List any five properties of light.
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उत्तर
- Light is a form of energy.
- Light always travels along a straight line.
- Light does not need any medium for its propagation. It can even travel through a vacuum.
- The speed of light in a vacuum or air is c = 3 × 108 ms-1.
- Since light is in the form of waves, it is characterized by a wavelength (k) and a frequency (v), which are related by the following equation: c = v λ (c – velocity of light).
- Different coloured light has different wavelength and frequency.
- Among the visible light, violet light has the lowest wavelength and red light has the highest wavelength.
- When light is incident on the interface between two media, it is partly reflected and partly refracted.
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संबंधित प्रश्न
Write true or false of the following statement.
We can see an object through an opaque medium.
Write true or false of the following statement.
A shadow is formed because light travels in a straight-line path.
Fill in the blank.
Light travels in a ................. path.
Explain the difference between a transparent, a translucent, and an opaque medium. Give two examples of each.
Write the names of some cold light-emitting objects.
Tick the correct answer.
Substance which don’t allow light to pass through them,
The sun and ______ are the natural sources of light.
Write true or false
The stars have no light.
State whether the following statement is True or False.
An object can be seen only if it emits light
Look at the figure given in the following figure.
Will there be any difference in the shadow formed on the screen in A and B.
