Homework
- Ex 3D, p.66--67, Wave Properties
- Ex 3E, p.69-70, Diffration
- Ex 3F, p.3F, p.73-75 Superposition
Basic Properties of Waves
waves transfer energy through a medium without transferring the medium itself
- Cycle - a basic repeating unit in a wave
- Amplitude A (m) - the distance from the middle point to the top of a crest, or bottom of a trough
- Wavelength 𝜆 (m) - the distance/length of one cycle
- Period T (s = s per cycle) - the time it takes for one cycle to pass a point
- Frequency f (Hz = cycles per second) - the number of cycles that pass in one second
T = 1/f & f = 1/T
- Wave Speed v (ms-1) the speed of a wave
v = 𝜆/T & v = f𝜆
Wave Properties
Frequency & Period
Wave Phase
Pendulum Waves
Longitudinal Waves
particle displacement in the medium is parallel to the direction of wave propagation e.g. sound waves, primary earthquake waves
Transverse Waves
particle displacement in the medium is perpendicular to the direction of wave propagation e.g. light and other electromagnetic waves, secondary earthquake waves
- Superposition of Waves: two waves traveling through each other will not change each other motion in any way, but they will add to one another when they overlap
- Constructive Interference - Reinforcement - In Phase
- Deconstructive Interference - Cancellation - Out of Phase
