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
Lawn mower
invented by Edwin Budding
A lawn mower (also known as a mower, grass cutter or lawnmower) is a machine…
Morse code
invented by Samuel Morse
Morse code is a method used in telecommunication to encode text characters as…
Electromagnetic induction
invented by Michael Faraday
Electromagnetic or magnetic induction is the production of an electromotive…
Fuel cell
invented by William Robert Grove
A fuel cell is an electrochemical cell that converts the chemical energy of a…
Suggest an invention you think it should be here
About
Inventions that changed the world
Leave a Reply