Study Notes
Waves in air, fluids, and solids involve the transfer of energy without the movement of particles. Transverse waves have perpendicular displacement to wave direction, while longitudinal waves have parallel displacement.
- Transverse Waves — Displacement of the medium is perpendicular to the direction of wave propagation. Example: Ripples on water, electromagnetic waves.
- Longitudinal Waves — Displacement of the medium is parallel to the direction of wave propagation. Example: Sound waves, P-waves.
- Wave Speed — The rate at which energy moves through a medium, calculated as frequency multiplied by wavelength. Example: v = fλ.
- Amplitude — Maximum displacement from the equilibrium position. Example: Higher amplitude means louder sound.
- Frequency — Number of oscillations per unit time, measured in Hertz (Hz). Example: Higher frequency means higher pitch.
Exam Tips
Key Definitions to Remember
- Transverse waves: Perpendicular displacement.
- Longitudinal waves: Parallel displacement.
- Wave speed: v = fλ.
Common Confusions
- Transverse waves cannot travel through gases.
- Longitudinal waves cannot travel in a vacuum.
Typical Exam Questions
- What is a transverse wave? A wave with perpendicular displacement to its direction.
- How do you calculate wave speed? Multiply frequency by wavelength.
- What is the difference between transverse and longitudinal waves? Transverse waves have perpendicular displacement, longitudinal waves have parallel displacement.
What Examiners Usually Test
- Understanding of wave properties and examples.
- Ability to calculate wave speed using the formula.
- Differences between transverse and longitudinal waves.