wave properties
TRANSCRIPT
Wave PropertiesWaves A movement of energy in space and time
Medium substance the wave travels through
Frequency (f) How frequently a wave comes # of waves / second = 1 / sec = Hertz
Period (T) How long each wave takes seconds / wave = seconds
These are inversely related: f = 1 / T
Speed of a wave Velocity = frequency * wavelength
v = f * λ
2 Types of Waves• Transverse
Medium moves perpendicular to the wave
Ex. Radio, Sunlight, Liquids
Crest
Trough
Amplitude
Wavelength
Direction of wave
Direction of medium
• Longitudinal Medium moves parallel to the wave
Ex. Sound, Water
Compression
Rarefaction
Direction of wave Direction of medium
Interference
• Constructive the amplitudes of waves passing through each other add up
• Destructive the amplitudes of waves passing through each other cancel out
Reflection bouncing of a wave off a barrier
Diffraction Bending of a wave around a barrier
Refraction bending of a wave when entering a new medium
Polarization filtering part of a wave out
Standing WaveA wave which looks like it is standing still.
The reflected wave hits at the same point as the incident wave.
Nodes points where the medium doesn’t move
Antinodes points where the medium has maximum displacement
Harmonic standing waves that sound good together.
# of harmonic is # of antinodes.
1st Harmonic lowest frequency that will fit in pipe or on a string