The Atmosphere

The Ozone Layer

How did Charles Fabry discover that the ozone absorbs ultraviolet light?

Fabry (1867–1945) invented the interferometer (a device measuring how light waves interfere with each other) with fellow French physicist Albert Pérot (1863–1925). He used this Fabry-Pérot interferometer to measure the Doppler effect on light in the laboratory. Then, in a 1913 experiment, he used it to learn that UV radiation is absorbed by the ozone layer.


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