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प्रश्न
Does light travel faster in air than in water? Why?
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उत्तर
Yes, light travels faster in the air than water. Because light does not require any medium for their propagation and they are not mechanical waves. The quantities which oscillate in light are mechanical and electric fields. And electric and magnetic fields decrease with the medium in between them. So, light travels faster in the air than water.
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संबंधित प्रश्न
Explain with an example, the propagation of sound in a medium.
If you place your ear close to an iron railing which is tapped some distance away, you hear the sound twice. Explain why?
How does the following factor affect, if at all, the speed of sound in air:
Moisture in air
Complete the following sentence :
A transverse wave is composed of crest and ____________.
The correct statement is :
Select the correct option:
The wavelength is the linear distance between the:
Select the correct option:
The number of oscillations passing through a point in unit time is called:
Is the speed of sound different in different media?
Does the speed of sound depend upon the direction of wind?
Describe in brief, with the aid of a sketch diagram, an experiment to demonstrate that a material medium is necessary to transmit sound.
