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
