According to professor Einstein Light shows both particles and wave like behaviour but we know in vacuum sounds can't travel as their is no particles then what behaviour does light shows in vacuum?

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Solution

Sound waves are mechanical waves. Unlike EM waves, mechanical waves can't travel in vacuum, because for their propagation they require oscillation of matter. So they can transfer only through a medium.

while

Light is a transverse, electromagnetic wave that can be seen by humans. The wave nature of light was first illustrated through experiments on diffraction and interference. Like all electromagnetic waves, light can travel through a vacuum. The transverse nature of light can be demonstrated through polarization.

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Q. We know that light travels does not rerequir a midium but travels through vacuum. How does light travels in vacuum or in space which hasn't have even air

The correct statement is :

(a) Sound and light both require medium for propagation

(b) Sound can travel in vacuum, but light can not

(d) Sound and light both can travel in vacuum.

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