Why can light waves travel in vacuum whereas sound wave cannot?

What are sound waves ?

Explain light as a wave.

If light travels from vacuum to water, its wavelength

Radio waves and visible light in vacuum have

Speed of sound wave in air

The transverse sound waves are produced in

For sound waves, the Doppler formula for frequency shift differs slightly between the two situations: (i) source at rest observer moving, and (ii)source moving observer at rest.The exact Doppler formulas for the case of light waves in vacuum are, however,strictly identical for these situations.Explain why this should be so.Would you expect the formulas to be strictly identical for the two situations in case of light travelling in a medium?

What is velocity of sound wave ?

What is superposition of sound waves ?

Assertion: For sound waves, air is rarer medium than water. Reason: For sound waves, the density of water is greater than air.