Waves key words

Question	Answer
Amplitude	The height from the point of equilibrium to the highest point of a crest or the lowest point of a trough
Frequency	the number of waves produced in a source (typically in a given amount of time)
Period	time it takes to complete one oscillation
Wavelength	the distance between one point on a wave and the same point on the next one
Diffraction	When waves spread out when they pass an edge
Reflection	when a wave is bounced off a surface
Refraction	the result of passing through mediums of various densities - changes direction
Critical angle	The angle at which the light ray is refracted enough that that it becomes parallel to the surface
Analogue	Frequency and amplitude constantly changing
Digital	Pulses with two states, either on or off
Frequency of human hearing	20 - 20,000 Hz
Ultrasound	A sound of frequency above 20,000 Hz (heard by dolphins, dogs and bats)
Infrasound	A sound of frequency below 20 Hz (heard by elephants and cats)
Pitch	The higher the frequency, the higher the pitch
Volume	The higher the amplitude, the higher the volume (remember the ruler!)

Resource summary

	Created by Carolina Nina Matos about 9 years ago