Working With Waves
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What is the crest of a wave?
The top of the wave
What is the trough of a wave?
The bottom of the wave
What is a period in waves
The time between two crests of a wave
What is the principal of superposition mean?
When waves from 2 sources arrive at the same place then they add together
What does constructive interference mean for a wave?
If the two waves are the same than the wave gets bigger so it’s louder
What does destructive interference mean for a wave?
If the waves are opposite they are in anti-phase so they cancel each other out making the wave smaller
What is it called when the wave is in phase
Constructive interference
What is it called when the wave is in anti-phase?
Destructive interference
What is the speed of light?
3x10⁸
What is the wave speed of c
3x10⁸
What is the speed of a radio wave?
3x10⁸
What are the two types of waves?
Transverse and longitudinal
What is frequency measured in?
Hertz (Hz)
How do you work out frequency
Wavelength divided by time Frequency= Wavelength/time (s)
How does amplitude affect light
High amplitude brighter light
How does amplitude affect light
High amplitude brighter light
How does frequency affect light and sound
Sound higher pitch Different colours for light
What is the compression part of a longitudinal wave
When the waves are close together
What is the rare fraction part of a longitudinal wave
When the waves are furthest apart
How do you work out wave speed and units
Wave speed (ms-¹) = frequency x wavelength f (Hz) x Lambda (metres)
How do you work out waves speed with distance and time
Wave speed equals distance divided by time Distance/time
How do you work out circumference with radians
2pieRadians
What is a radian
One radian is the angle of an arc that is equal to the radius
What is diffraction
The spreading out of a way when passing for a barrier