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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
Describe a simple experiment which demonstrates that the sound produced by a tuning fork is due to vibrations of its arms.
Explain with an example, the propagation of sound in a medium.
Name the two kinds of waves in form of which sound travels in a medium.
What is a longitudinal wave? In which medium: solid, liquid or gas, can it be produced?
How does the speed of sound change with change in (i) amplitude and (ii) wavelength, of sound wave?
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:
Moisture in air
Define the term wavelength.
Can sound travel through vacuum?
How are sound waves produced? How are sound waves transmitted from one place to the other?
