Question : Which of the following gases shields the surface of the Earth from ultraviolet (UV) radiation from the Sun?
Option 1: Carbon monoxide
Option 2: Ozone
Option 3: Oxygen
Option 4: Carbon dioxide
Correct Answer: Ozone
Solution : The correct answer is Ozone .
The French physicists Charles Fabry and Henri Buisson discovered the ozone layer in 1913. 97 to 99 per cent of the medium-frequency UV radiation emitted by the sun is absorbed by the ozone layer.
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