Final answer:
Sound waves differ from light waves in many respects. One important difference is that sound waves cannot propagate through a vacuum, unlike light waves which are electromagnetic and can travel through space without a medium.
Step-by-step explanation:
Sound waves differ from light waves in that sound waves cannot travel through a vacuum. While light waves, which are electromagnetic waves, require no medium and can travel through space, sound waves are mechanical waves that require a medium, such as air, water, or solids, to propagate. The movement of molecules in these media represent the pressure variations that we perceive as sound.
Furthermore, as light waves have much shorter wavelengths, they can behave like rays and create sharp shadows. In contrast, sound waves have longer wavelengths and can bend around obstacles, allowing them to be heard even if they pass through an opening such as a doorway.