A harmonic (sinusoidal) wave travelling along a stretched string is an example of a __________ wave.

The correct answer is transverse.

Key Points

• A transverse wave is a wave where the particles of the medium move perpendicular to the direction of the wave's propagation.
• In the case of a harmonic wave travelling along a stretched string, the string's particles oscillate up and down while the wave travels horizontally.
• Transverse waves can be found in various scenarios, such as electromagnetic waves (light waves) and water waves.
• They are characterized by crests and troughs in the wave pattern.

Additional Information

• Gravity Waves: These are waves generated in a fluid medium or at the interface between two media when the force of gravity acts as the restoring force. They are often seen in the ocean and atmosphere.
• Longitudinal Waves: In these waves, the particles of the medium move parallel to the direction of the wave's propagation. Examples include sound waves in air.
• Capillary Waves: These are small waves on the surface of a fluid whose restoring force is the surface tension of the fluid. They are typically seen in small bodies of water.