Introduction
Waves are everywhere:- Ocean- Earth- Matter( Probability waves, Predict behavior of e-, particles)- Sound- > What we hear- Sight- > What we see- Electromagnetic waves( Power to our homes, Radio & TV, Electronics)
Properties of waves:-Energy-Momentum-Velocity-Linearity
Energy:
- " Like moving objects, moving waves carry energy from one place to another "- J. R. Pierce
- Energy is not transmitted by the media that support waves, but by the waves themselves.
- EM waves from sun to earth have power of 1KW / m 2.- Plants are supported on this energy and we are supported by plants.
Momentum: Moving waves have momentum when a wave is absorbed or reflected by and object, the wave pushes on that object.
Velocity: It takes time for a wave to go from one place to another. Light: 186,000 Miles / Sec, 300,000 KM / Sec Sound:( Through air) ~ 1129 feet / Sec
Oscillations: Motions that repeat themselves. Periodic Harmonic motion: Motion that repeats itself at regular intervals. Simple Harmonic Motion: Harmonic Motion that is sinusoidal.