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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
Choose the correct word/words to complete the following sentence :
When sound travels in a medium ____________
What is a longitudinal wave? In which medium: solid, liquid or gas, can it be produced?
How does the following factor affect, if at all, the speed of sound in air:
Frequency of sound
How does the following factor affect, if at all, the speed of sound in air:
Pressure of air
How does the following factor affect, if at all, the speed of sound in air:
Moisture in air
A longitudinal wave travels at a speed of 0.3 m s-1 and the frequency of wave is 20 Hz. Find the separation between two consecutive compressions.
Select the correct option:
The wavelength is the linear distance between the:
Is the speed of sound different in different media?
Is it possible to hear your friend's voice in vacuum? Give reason for your answer.
How will the following factors affect the speed of sound in air:
Temperature of air.
