Waves Flashcards
What is a longitudinal wave?
In longitudinal wave the medium oscillates parallel to the direction of travel of the wave
Give an example of longitudinal wave
Sound
Pressure
What is transverse wave?
In a transverse wave the medium oscillates perpendicular to the direction of travel of the wave
Give an example of a transverse wave
Water
Light
What does waves transfer?
Energy
What is a wavelength?
Distance from one point a wave to the same point on the next
What is a time period?
The time for a wave to complete one cycle
What is frequency?
Number of waves produced per second
What is amplitude ?
The height of the wave from its equilibrium position
Equation for time period
Time period=1/frequency
T=1/f
Equation for wave speed
Wave speed=frequency x wavelength
v=f x wavelength
What is the units for wave speed ?
Metres per second
m/s
What is the unit for frequency ?
Hertz
Hz
What is the unit for wavelength
Metres
m
What is the unit for time period ?
Seconds
s
What is the range of human hearing ?
20-20000HZ
What is the order of the electromagnetic spectrum?
Radio waves
Microwaves
Infra red
Visible light
Ultra violet
X ray
Gamma
What does an amplitude determine?
The loudness
What does wavelength determines?
The pitch
What sound would it be if the amplitude is low?
Quite sound
What sound would it be if the amplitude is high?
Loud
What sound would it be if the frequency is low?
Low pitched sound
What sound would it be if the frequency is high?
High pitched sound
What is the Doppler effect?
It’s the apparent shift in the wavelength of a wave when a source moves relative to an observer (towards or away)
Because the wave maintains the same speed, when the wavelength changes, the frequency is also shifted
