Yesterday’s Google Doodle was an homage to Heinrich Hertz. The man’s work touches all of us, in developed countries at least, on a daily basis, if not more often. Wikipedia says:
“He was the first to conclusively prove the existence of electromagnetic waves by engineeringinstruments to transmit and receive radio pulses using experimental procedures that ruled out all other known wireless phenomena”
The scientific community saw fit to name the unit of frequency in honor of his work.
Electromagnetism propagates in waves, and so does sound through materials. Numerous other phenomena exhibit cyclic behaviour and frequency measurements are used in dozens of fields of human endeavour. You could write a grimoire on the art, science and culture touched by cyclic patterns, so I’ll stop here before that project takes over my life.
I’m a day late so I missed my chance to take a screen shot of the doodle – it was an amplitude modulated sine wave in the corporate colour-scheme. You get a nice spread of hits if you Google his name.