Edexcel physics unit 2

Edexcel physics unit 2

1. Waves

   • Transfers energy away from its source
   • Bits of a wave
     • Displacement/x (m) how far the wave has moved
     • Amplitude/a (m) maximum displacement of the wave
     • Wavelength/λ (m) distance between crest to crest
     • Period/T (s) time taken for a whole vibration
     • Frequency/f (Hz) number of vibrations per second
     • Phase Difference amount of which one wave is behind the other one
   • Can be reflected or refracted
     • Reflection
       • Bounces back when it reaches a boundry
     • Refraction
       • Canges direction when it enters a different medium
   • Wave Speed = distance moved / time taken
     • v=fλ
   • Polarisation
     • Only allows waves to oscillate in one direction

2. DC electricity

3. Nature of light