Waves Flashcards
Longitudinal Wave
A wave in which particles of the medium move in a direction parallel to the direction that the wave moves.
Wavelength
Defined as the distance between two successive crests or troughs of a wave. It is measured in the direction of the wave.
Amplitude
The maximum displacement or distance moved by a point on a vibrating body or wave measured from its equilibrium position.
How fast does sound travel in gases?
343 meters per second
How fast does sound travel in liquid?
1481 metres per second
How fast does sound travel in solids?
6000 metres per second
Reflection
What is the change in direction of a wavefront at an interface between two different media so that the wavefront returns into the medium from which it originated.
Refraction
The fact or phenomenon of light, radio waves, etc. being deflected in passing obliquely through the interface between one medium and another or through a medium of varying density.
How can ultrasound be used to calculate distances?
Ultrasound can be used to measure distances to objects by measuring the delay between the transmission of an ultrasound pulse and the return of the echo.
Human hearing range
20Hz to 20KHz
What is the equation to work out frequency?
Frequency = Speed/Wavelength
What is the equation to work out wavelength?
Wavelength = Speed/Frequency
What is the equation to work out wave speed?
Speed = Wavelength x Frequency.
Wave Frequency
The number of waves that pass a fixed point in a given amount of time.
Equilibrium
What is the horizontal line in the middle of the wave called?
