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