ENERGY Disturbance that transfers ENERGY through different mediums WAVES
ENERGY: the ability to do work Medium: material through which waves move Gas (air) Liquid (water, molten rock) Solids (ground, rope, railroad tracks, ice)
Mechanical waves: require a medium Cause? Source of energy causes medium to vibrate Electromagnetic waves: does not require a medium can travel through empty space (waves from the sun – light, UV microwave, x- ray, radio waves, etc) What carries waves?
Amplitude Resting position to crest or trough Measure of the amount of energy
Wavelength: Energy Amplitude: Energy Frequency: Energy Energy: wavelength, amplitude & frequency
Different waves travel at different speeds. Speed: how far the wave travels in a given length of time Speed = wavelength x frequency Speed Speed * see flash of lightning *(few seconds later) hear thunder rumble