waves Flashcards
what are mechanical waves
waves that pass through a substance example sound waves
what is longitudinal waves
the oscillation is parallel to energy transfer
what is transverse waves
the oscillation is perpendicular to energy transfer
what is amplitude
maximum displacement from equilibrium point
what is frequency
the number of waves passing a point in one second
what is time period
time for one complete wave to pass a point
wavelength formula
c = wavelength x frequency
what is superposition
when two waves travelling in opposite direction meet the combining effect is superposition
what is coherent source
they produce waves with same frequency and same wavelength with constant phrase difference
when is stationary wave produced
when two progressive waves pass through each other
what is node
displacement is zero for example they are at end points
what is antinode
is when the displacement is maximum for example antinodes are at amplitude
another waves formula when wavelength isnt given but length is
l =m x wavelength / 2
frequency formula linking tension and mu
F = 1/2L square root T/u
what happens to frequency wavelength and speed when entering a medium
wavelength and speed changes
frequency stays the same
