wave theory

wave theory

1. types of waves

   • Transverse
     • Transverse waves are waves that travel perpendicular to the waves themselves
   • longitudinal
     • longitudinal waves are waves that travel parallel to the waves themselves

2. Definitions

   • Frequency
     • the number of complete waves per second
   • Wavelength
     • the distance from peak to peak or trough to trough
   • Rarefaction
     • a point at which waves are further away from each other than normal
   • Compression
     • a point at which waves are closer together than normal
   • Amplitude
     • the distance from the horizontal axis to the peak
   • Critical Angle
     • the angle of incidence at which the angle of refraction is 90
   • Focal length
     • The distance between the centre of a lens and the principal focus
   • Diffraction
     • waves spreading out when it goes through a small gap

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