S3 N5 test revision Flashcards
What is the definition of refraction?
Refraction is the change of the speed and wavelength of light when it travels from one material into another
What is the definition of diffraction?
Diffraction is the bending of a wave around an object
What is the formula for measuring speed?
V=d
t
What is speed measured in?
Metres per second
m/s or ms-1
What is the period?
The period of a wave is the time taken for one complete wave to pass a point. It has the unit seconds (s)
What is amplitude?
Amplitude is the distance from the centre of the wave to the crest or trough. It has the unit metres (m)
What is wavelength?
Wavelength is the distance from a point of one wave to an identical point on the next. It has the unit metres (m)
What is the period?
The time taken for one complete wave to pass a point. It is measured in seconds
What is the wave speed?
Distance travelled by a wave in one second. It is measured in metres per second (ms-1)
What is frequency?
The number of waves that pass a fixed point in one second. It is measured in hertz (Hz)
What are transverse waves?
Transverse waves are waves in which the motion of the particles is at 90° to the direction of motion of the wave
What are longitudinal waves?
Longitudes waves are waves in which the motion of the particles is in the direction of motion of the wave
When related to sound, what is amplitude?
Volume
When related to sound, what is frequency?
Pitch (Hz)
