A card from a free library — ask anything, no account, works offline. Every card carries its source.
The Doppler effect — the acoustic redshift
acoustics
A source moving toward you raises the pitch, away lowers it (the passing siren) - the waves bunch ahead and stretch behind. It is the acoustic cousin of the relativistic redshift of light. Rests on relativity.
source
Narrow Highway — acoustics
card id
card_acoustics_doppler
address
WIT.codex.FCT/the-doppler-effect-the-acoustic-redshift/REF.WITNESSED@narrow-highway
adjoining cards
- part of → Acoustics — waves, loudness, and harmonics — a pillar of acoustics (The Doppler effect)
- connects at → Relativity — many frames, one invariant — the Doppler effect is the acoustic analogue of the redshift - same geometry, different med
Is this card incomplete? Tell the library — it will call out for more ↗