Physics definitions
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TERMINOLOGIYA PHYSIC
Physics definitions |
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Wave vibrates perpendicular to the direction of propagation. Diffraction The spreading out of a wave as it moves through a gap or around an obstacle. Interference When waves, in the same medium, combine to form a resultant amplitude. Constructive When waves combine to form a greater amplitude. Destructive When waves combine to form a lesser amplitude. Polarisation When a wave is confined to a single plane. Standing Waves Waves of the same frequency and amplitude that constructively and destructively interfere to form a wave pattern in a confined space. Node Part of a standing wave which does not move. Antinode Part of a standing wave which moves the most. The Doppler Effect The relative change in frequency due to the relative motion of the source and observer. Fundamental Frequency (f) (Hz) The largest standing wave. Sound Quality The number of overtones/harmonics present. Overtones/Harmonics Integer multiples of the fundamental frequency. 1st harmonic = f 1st overtone = 2f Intensity (I) (W/𝑚 2 ) The amount of sound energy passing through 1𝑚 2 perpendicular to the direction of propagation. Resonance The transfer of energy between 2 bodies with the same natural frequency. Dispersion The separation of light into its constituent colours. Colours Primary The three colours that combine to make white light. Secondary Combining 2 primary colours in equal amounts. Complementary Secondary colours that combine with primary colours to create white. |
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