Doppleri May 2026

Waves are compressed, resulting in a higher frequency (heard as a higher pitch in sound or seen as a "blue shift" in light).

Discovered by Austrian physicist Christian Doppler in 1842, the effect describes how wave properties shift based on motion: doppleri

Waves are stretched, resulting in a lower frequency (lower pitch or "red shift"). PubMed Central (PMC) (.gov)https://pmc.ncbi.nlm.nih.gov Waves are compressed, resulting in a higher frequency