- What do waves do?
- What are the two types of waves?
- Write definations for the two types of waves with image?
All travelling waves transfer energy through a medium without that medium travelling. Waves transfer Energy The energy is moved as an osillation. This leads to two types of waves: -
- longitudinal waves
- transverse waves
Longitudinal Waves: - A medium oscillates in the same direction as that of energy.
Transverse Waves: - A medium oscillates at right angles to the direction of energy.
- Wave length
- Relationship between Intensity and amplitude?
With a diagram
Intensity: - the energy transferred per second per unit area.
Amplitude (A): - The size of the oscillation measured from the midpoint to the maximum oscillation.
Wavelength (λ): - the length of the wave measured from maximum to maximum, crest to crest, trough to trough, compression to compression, rarefraction to rarefraction.
Intensity α (Amplitude)2
Wavefront: - A wavefront is a line of crests
Ray: - A ray is a narrow band of wavefronts
Compression: - In a longitudinal wave when the medium is squeezed together we call it compression.
Rarefraction: - In a longitudinal wave when the medium is spread out we call it rarefraction.
Frequency (f) - the number of waves produced per second. Unit is Hz
Period (T): - the time taken to produce a single complete wave. Unit is second