P5.1 Flashcards
What is amplitude?
It is how far the wave travels from the centre
What is the symbol for amplitude?
The symbol is a
What can amplitude be measured in?
Anything really, m, w, cm
What is the wavelength?
The length of 1 completed wave
What is the symbol for wavelength?
The symbol is lambda
What is the wavelength measured in?
Metres
What is the frequency?
The number of waves per second
What is frequency measured in?
Hertz (Hz)
What is the time period?
How long it takes to complete 1 wave
What is the time period measured in?
Seconds
What is the symbol for the time period?
T
What is the formula for frequency.
1/ time period
What is the speed of a radio wave and the speed of light?
3 x 10 to the power of 8 m/s
What is the formula for wave speed?
Frequency x wavelength
What happens to the wavelength if the frequency gets bigger?
The wavelength gets shorter
What is the formula for wavelength?
The speed of light (3 x 10 to the power of 8) / frequency
In terms of waves, what has the highest frequency (descending order)?
Radio waves Microwaves Infrared waves Visible light Ultra violet X-rays Gamma rays
What happens to a sound wave at a boundary?
The sound can be:
Reflected (an echo)
Transmitted (and possibly refracted)
Absorbed
What is ultrasound?
Is the sound of a frequency greater than 20,000 hertz
