stationary waves Flashcards
whats another name for stationary waves
standing waves
what is 1 example of stationary wave
waves on strings
how are stationary waves produced
Through interference in accordance to the principle of superposition
What factors need to be met in order for a stationary wave to be produced on a string or in a pipe
The two waves that overlap must be travelling in
opposite directions
same frequency
approx equal amplitudes .
Define what a node is
It is the points in the stationary wave where there is no displacement of the particles at any time
Define what an antinode is
At the antinode , the displacement of the particles in a stationary wave varies by the maximum amount.
What is the distance between a node and an antinode
its 1/4 λ
What is the distance between two adjacent nodes or two adjacent antinodes
1/2 λ
What does resonating mean
When a particle oscillates at its maximum amplitude due to a driving force
how are stationary waves different to progressive waves
Stationary waves are confined to a fixed position whereas progressive waves radiate energy out from a
point.
For stationary waves, there is no net energy flow, whereas for progressive waves there is.
how are stationary waves SIMILAR to progressive waves
Both waves can be described in terms of their respective wavelengths, frequencies and amplitudes.
Reference may also be made to reflection and interference.
can you produce stationary waves with other types of longitdunal and transverse waves and 1 example
yes eg. microwaves
what are the 3 factors of the frequency of the vibrations of a string
Its mass per unit length
its tension - changed using tuning
The length of the string - increase decrease by fingers
What is the effect of bowing a violin
to create progressive transverse waves that travel opposite directions along string away from the bow.
When these waves reach the point when the string i fixed to the wood, they reflect back and interfere to produce a stationary wave.
Define fundamental mode of vibration
Length of the string is half the wavelength.
This produces the lowest possible frequency called the first harmonic.
Other harmonics are whole number multiples of this frequency.
