1What are waves?
waves are energy in motion. they transfer energy and information without transferring matter
2What travels with water and sound waves?
The wave, not the water or sound itself
3Define wavelength
The distance between two corresponding parts of a wave
4Define the frequency of a wave
The number of waves passing a point each second
5Define amplitude of a wave
Distance from top of peak to the middle
6Define period of a wave
The time it takes for a source to produce one wave
7Define wave velocity
It is the direction and speed a wave travels in. (affected by materials)
8Define wavefront
horizontal line drawn linking all the peaks in a set of waves
9Whats the difference between longitudinal waves and transverse waves?
Longitudinal dal- vibrations are parallel to the direction of the wave travel
Transverse- vibrations are at right angles to the direction of wave travel
10Give examples of longitudinal waves
Sound waves
Seismic waves
11Give examples of transverse waves
electromagnetic radiation
water waves
12What's the equation for wave speed?
wave speed(m/s) = frequency(Hz) x wavelength(m)
13What's the equation for wave speed including distance?
wave speed(m/s)=distance(m) / time(s)
14How to measure the velocity of sound in air
1. 2 people stand 400m apart
2. One person fires and pistol, starting the stop watch, and the other raises their hand once they hear it and the stopwatch is stopped
3. Use speed= distance/time
15What is refraction?
when waves change speed when they pass from one medium into another due to the change in density. The density effects the speed
16What can some waves do?
Some waves may absorb, transmit or reflect waves which depends on their wavelength
17What are EM waves?
EM waves are a group of transverse waves that can travel though a vacuum
18The impact of speed on the direction of refraction
The right hand side of the incoming wave slows down before the left hand does which causes a change in direction