EM waves travel through empty space.

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Multiple Choice

EM waves travel through empty space.

Explanation:
EM waves are self-propagating oscillations of electric and magnetic fields that do not require a material medium to move. In vacuum, there’s no matter to push, yet the changing electric and magnetic fields sustain each other and carry energy at the speed of light. This is why sunlight and radio signals can travel through space. Mechanical waves, like sound, need a medium to transfer energy, so they can’t travel through empty space. EM waves can travel through any medium, but the vacuum case shows they don’t rely on matter at all.

EM waves are self-propagating oscillations of electric and magnetic fields that do not require a material medium to move. In vacuum, there’s no matter to push, yet the changing electric and magnetic fields sustain each other and carry energy at the speed of light. This is why sunlight and radio signals can travel through space. Mechanical waves, like sound, need a medium to transfer energy, so they can’t travel through empty space. EM waves can travel through any medium, but the vacuum case shows they don’t rely on matter at all.

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