The Principle of Superposition The principle of superposition states that when two or more waves with the same frequency travelling in opposite directions overlap, the resultant displacement is the...
Polarisation Transverse waves are waves with their displacement perpendicular to their direction of travel. These oscillations can happen in any plane perpendicular to the propagation direction Tra...
Properties of Electromagnetic Waves Visible light is just one part of a much bigger spectrum: The Electromagnetic Spectrum All electromagnetic waves have the following properties in common: They ar...
Doppler Shift of Sound The whistle of a train or the siren of an ambulance appears to decrease in frequency (sounds lower in pitch) as it moves further away from you This frequency change due to th...
Properties of Transverse & Longitudinal Waves In mechanical waves, particles oscillate about fixed points The direction of oscillations with regards to the direction of wave travel determine wh...
Wave Intensity Progressive waves transfer energy The amount of energy passing through a unit area per unit time is the intensity of the wave Therefore, the intensity is defined as power per unit ar...
Derivation of v = f λ Using the definitions of speed, frequency and wavelength, the wave equation v = fλ can be derived This is an important relationship between three key properties of a wave The ...
Cathode-Ray Oscilloscope A Cathode-Ray Oscilloscope is a laboratory instrument used to display, measure and analyse waveforms of electrical circuits An A.C. current on an oscilloscope is represente...
Wave Motion Energy is transferred through moving oscillations or vibrations. These can be seen in vibrations of ropes or springs Waves can be shown through vibrations in ropes or springs The oscill...
