Stationary Waves/Harmonics Flashcards
What is a stationary wave?
Result of superposition of two progressive waces with the same frequency travelling in opposite directions. Can be produced from any type of wave.
Define node
A point with zero amplitude
Define antinode
A point of maximum displacement/amplitude
What is the time period and frequency of stayionary waves?
The same as the progressive wave that forms it
do stationary waves tranfer energy
No net energy transfer
Is frequency the same for all points of a stationary wave
Yes except for nodes where f = 0
What is the seperation between adjacent nodes/antinodes
λ/2
What is the seperation between an adjacent node and antinode
λ/4
How does amplitude vary in stationary waves?
Varies from zero at the node to max at the antinodes
What is phase difference in stationary waves?
180° x n
n = no nodes between points
Define Fundamental frequency
The minimum frequency of vibration for a given arrangement
Define first harmonic/fundamental node of vibration
Has frequency equal to fundamental frequency
What do all harmonics of stationary waves have in common?
The frequency is a multiple of the fundamental frequency
Is there a node or an antinode at the end of open tube
Antinode
Is there a node of an antinode at the end of a closed tube
Node
How do u determine speed of a stationary wave?
Use length of tube and find the wavelength
REARRANGE CORRECTLY
sub into v = λf
