Physics for IGCSE & O level - Waves And Sounds (Section 6 - No. 10)

What is a key difference between sound waves and light waves?
Sound waves are transverse, light waves are longitudinal.
Sound waves require a medium, light waves do not.
Sound waves travel faster than light waves.
Sound waves can travel in a vacuum.

Explanation

Sound waves require a medium to travel, whereas light waves can travel through a vacuum.

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