Zusammenfassung der Ressource
P1 A spectrum of waves
- Wave properties
- The amplitude of a wave is the
maximum displacement of a
particle from its rest postiion
- The crest of a wave is the highest
point on a wave above its rest
position
- The trough of a wave is the
lowest point on a wave below its
rest position
- The wavelength of a wave is the
distance between who successive
points on a wave having the same
displacement and moving in the
same direction
- The frequency of a wave is the
number of complete waves
passing a point in one second
- Wave speed = frequency x wavelength
- Getting messages across
- Some optical instruments use two or more plane
mirrors
- Refraction occurs because the speed of waves
decreases as the wave enters a more dense
medium and increases as the wave enters a less
dense medium. The frequency stays the same
but the wavelength changes
- Diffraction is the
spreading out of a wave
as it passes through a
gap.
- The size of a communications receiver
depends on the wavelength of the
radiation