The Crookes radiometer (also known as a light mill) consists of an airtight glass bulb containing a partial vacuum, with a set of vanes which are mounted on a spindle inside. The vanes rotate when exposed to light, with faster rotation for more intense light, providing a quantitative measurement of electromagnetic radiation intensity.
Related
Ballpoint pen
invented by John J. Loud
A ballpoint pen, also known as a biro (British English), ball pen (Philippine…
Electric telegraph
invented by Francis Ronalds
An electrical telegraph was a point-to-point text messaging system, used from…
Color photography
invented by James Clerk Maxwell
Color photography is photography that uses media capable of capturing and…
Dandy horse
invented by Karl Von Drais
The dandy horse, a derogatory term for what was first called a Laufmaschine (in…
Suggest an invention you think it should be here
About
Inventions that changed the world
Leave a Reply