Wave Textbook Goodnotes Recap Flashcards
Progressive Wave?
A moving wave carries energy from one place to another without transferring energy to the surroundings
Wave causes?
Something making particles or fields oscillate at a source
Wave energy loss?
Oscillations pass through medium or field carrying energy and losing it as it gets further from a source
Wave behaviours?
Reflection, Refraction, Diffraction
Reflection?
When a wave is bounced back when it hits a boundary
Refraction?
Where a wave changes direction and velocity as it enters a different medium because of the change in refractive index
Diffraction?
The wave spreads out as it passes through a gap or round the obstacle
Displacement?
Has the symbol x and is measured in metres and is how far an object has moved from its undisturbed position
Amplitude?
Measured in metres with the symbol a and is the maximum magnitude of displacement
Wavelength?
Measured in metres and has the symbol λ and is the length of one whole wave oscillation otherwise wave cycle
Period?
Has the symbol T and is measured in seconds and is the time taken for a complete wave cycle
Frequency?
Has the symbol f and is measured in hertz and is the whole number of complete wave cycles or oscillations per second passing a given point from the source
Phase?
The measurement of the position of a certain point along the wave cycle and is measured in degrees or radians
Phase difference?
The amount by which one wave lags behind another wave and is measured in degrees or radians
Frequency and Period?
Inversely proportional relationships in the equation. Frequency = 1 / Period
Wave speed equation?
c = d / t
Wave speed = distance / time
c = f x λ
Wave speed = frequency x wavelength
Speed of light?
3 x 10^8 ms-1
Measuring Speed of Sound?
Microphones picking up waves from a signal generator and time and distance between microphone picking it up is recorded.
Measuring wave speed?
Record depth of ripple tank. Use a dipper to create frequency. Use a strobe light to periodically flash. Increase frequency until the same as light. Measure distance between 2 adjacent peaks.
Transverse Waves?
The direction of energy transfer is perpendicular to displacement of particles
Transverse Waves Movement?
Travel as vibrations through magnetic and electric fields with vibrations perpendicular to the transfer of energy
Transverse wave examples?
EM waves, ripples on water, waves on strings, certain types of earthquake waves (s) waves
Transverse wave graph?
Shown on displacement-time graphs and vibrations upwards from centre line has symbol a+ and downwards has a-
Longitudinal waves?
Have the displacement of particles or field parallel to the direction of energy transfer