CP4 Waves

Question 1

Transverse/Longitudinal Waves

Answer 1

Waves- Transfer energy from one place to another without transferring matter.
Transverse Waves- causes the particles in the medium to vibrate at right angles to the direction of the wave’s motion. (PERPENDICULAR)
Longitudinal Wave- Causes the medium’s particles to vibrate in the same direction as the wave’s motion.(Parallel)
Examples of Longitudinal waves are Sound )waves and Pressure Waves
Example of transverse waves are water waves.

Question 2

Describing Waves

Answer 2

Wave Frequency- Number of waves passing a point each second.(Measured in hz)
Period- Length of time it takes 1 wave to pass a given point
Wavelength- Distance from a point on 1 wave to a point in the same position on next wave(measured in Metres)
Amplitude- Maximum distance of a point on the wave from the middle of the wave.(middle to top)
Velocity of wave is speed of the wave in the direction it is travelling

Question 3

Wave Speeds

Answer 3

Formulas to calculate Wave Speed:
Speed=Distance/Time
Wave   =   Frequency(hz) X Wavelength(m)
Speed
(m/s)
You can find speed of sound by measuring the time it takes for a sound to travel a certain distance.

Question 4

Refraction

Answer 4

If light enters a “more optically dense” medium then it will slow down. If it enters a less optically dense medium it will speed up.
Light is refracted when it travels from one medium to another and changes speed.