intro Flashcards
What is the effect of increasing frequency of a wave on the energy transferred per second?
- for a given amplitude + wave speed
- energy transferred per sec increases
What is the effect of increasing amplitude of a wave on the energy transferred per second?
- for a given frequency + wave speed
- energy transferred per sec increases
What can you work out from a pressure-distance graph?
amplitude & wavelength
What can you work out from a displacement-distance graph?
amplitude & wavelength
For a displacement-distance graph, which way do the particles move?
transverse:
- if sketch is below original, down
- if sketch is above original, up
longitudinal:
- y value increases, particles move right
- y value decreases, particles move left
For a displacement-time graph, which way do the particles move?
transverse:
- direction of graph line (up or down)
longitudinal:
- direction of graph line (left or right)
What is a wave cycle in terms of oscillations?
one complete oscillation of a particle about its equilibrium position
What is the frequency?
no. of wave cycles that pass a given point each second
What is the frequency in terms of oscillations?
no. of oscillations that a particle completes about its equilibrium position each second
Describe the movement of a particle in a single wave cycle of a transverse wave.
- from equilibrium position to max + displacement
- to max - displacement
- back up to equilibrium position
What is period in terms of a single particle?
time taken for a particle to complete one full oscillation
For a transverse wave, what does a displacement-time graph show?
the displacement of a single particle over time
What can you work out from a displacement-time graph?
- amplitude
- frequency
- period
What are electromagnetic waves made of?
- oscillations of an electric field
- perpendicular to a magnetic field
- generated by a charged particle
Which way is energy transferred in progressive electromagnetic waves?
direction of wave travel
For electromagnetic waves, what is the relationship between frequency and wavelength?
inversely proportional i.e highest frequency = shortest wavelength
In an EM wave, what is the amplitude?
the maximum field strength of the electric field
