Types of Waves
The particles move perpendicular (up and down) to the motion
Transverse waves
Distance from the centre line to the top of a crest or to the bottom of a trough. Measured in metres. The more energy the wave is carrying the greater it is.
Amplitude
What formula is used to find the frequency of a wave?
f=1/T OR f=time taken/# of waves
What formula can be used to find wave speed
v=d/t OR v=fλ
What formula can be used to find wavelength
λ=v/f
The particles move parallel (back and forth) to the motion
The distance from any point on the wave to the same point on the next wave. It is measured in metres.
Wavelength
Given T=30s, what is f?
0.033Hz
Given f=96Hz and λ=2m what is v
192 m/s
Given v=90m/s and f=96Hz, what is λ?
0.94m
Come in different forms, P-waves, S-waves, and L-waves.
Seismic waves
The number of waves passing a point in one second. Determines the pitch in sound waves, and the colour in light waves. It is measured in Hertz
Frequency
A teacher uses a 340Hz tuning fork in a class demonstration. What is the period for the tuning forks soundwaves?
0.0029s
A sound wave has a frequency of 140Hz and a wavelength of 1500m. What is the speed of the wave?
210000 m/s
A wave travels at a speed of 240m/s and has a frequency of 537Hz. What is the wavelength?
0.45m
longitudinal waves produced by vibrations, require a medium to travel through.
Sound waves
The time it takes for one wave to pass a point, measured in seconds.
Period
13.2 waves pass a given point in a time period of 2.2 seconds. Calculate the frequency
6Hz
Given f=2000Hz and λ=2.40x10-6m What is v?
0.0048 m/s
Given v=6x106m/s and f=21Hz, what is λ?
285814.28m
Travel at the speed of light, are all transverse waves, carry energy, and interact with materials differently based on wavelength, energy, and properties of the material.
Waves of the electromagnetic spectrum
How fast the wave is moving, measured in metres per second.
Velocity
5 waves pass a certain point over 1 minute. What is the frequency?
0.083Hz
5 waves over the span of 1.4m pass a given point over 18 seconds. What is the speed of the wave?
One wave crosses a given point every 0.67s. There are 5 waves in every 6.4m. Calculate the time it would take one of these waves to travel 1000m.
523.43s