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.
invented by John J. Loud
A ballpoint pen, also known as a biro (British English), ball pen (Philippine…
invented by Francis Ronalds
An electrical telegraph was a point-to-point text messaging system, used from…
invented by James Clerk Maxwell
Color photography is photography that uses media capable of capturing and…
invented by Karl Von Drais
The dandy horse, a derogatory term for what was first called a Laufmaschine (in…
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