Summary
Highlights
Waves are carriers of energy, and we encounter various types daily, such as sound waves from cars, light waves from fireworks, and ocean waves that transport surfers. This video will explore the distinction between mechanical and electromagnetic waves.
Mechanical waves, like sound or water waves, necessitate a medium (air, water, or solid) to propagate. In contrast, electromagnetic waves, such as light or radio waves, do not require a medium and can travel through empty space, although they can also pass through a medium.
Mechanical waves come in three main types: transverse waves, where oscillations are perpendicular to wave movement; longitudinal waves, where displacement is in the same direction as wave propagation; and surface waves, where medium particles exhibit a circular motion.
Electromagnetic waves, found on the electromagnetic spectrum, are almost exclusively transverse waves. A key difference in speed is that mechanical wave speed depends on the medium, while all electromagnetic waves travel at the speed of light in a vacuum.