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