Ozone Layer

Ozone Layer

In the Stratosphere (between 10 and 50 kilometers high) is the layer containing most of the atmospheric ozone and this is mainly concentrated at about 25 kilometers up. Ozone is produced in the ozone layer mainly through ultraviolet light from solar radiation (hn) colliding with diatomic oxygen (oxygen made of two atoms). Diatomic oxygen in the stratosphere absorbs the majority of the harmful ultraviolet radiation (anything with a wavelength smaller than 240 nm) and in doing this the absorbed energy splits the molecule leaving two individual oxygen atoms.

A graph shows ozone concentration by altitude. Ozone increases near the ground due to pollution and peaks between 15–35 km, forming the ozone layer in the stratosphere. An aeroplane flies below the ozone layer.

In the Stratosphere (between 10 and 50 kilometers high) is the layer containing most of the atmospheric ozone and this is mainly concentrated at about 25 kilometers up. Ozone is produced in the ozone layer mainly through ultraviolet light from solar radiation (hn) colliding with diatomic oxygen (oxygen made of two atoms). Diatomic oxygen in the stratosphere absorbs the majority of the harmful ultraviolet radiation (anything with a wavelength smaller than 240 nm) and in doing this the absorbed energy splits the molecule leaving two individual oxygen atoms.

A diagram showing ozone formation: UV solar radiation splits an O₂ molecule into two oxygen atoms, which then combine with O₂ to form O₃. O₃ absorbs more UV, releasing O₂ and a single oxygen atom.
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