Importance of ozone layer for the environment

1. Dr. SARITA KHOBRAGADE
Assistant Professor of Physics
Govt. P.G. College, Balaghaat (MP)
Email: saritakchaure@gmail.com.
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2. Outline
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 Layers of the Environment.
 The sun’s ultraviolet rays.
 What is Ozone ?
 Evolution / formation of Ozone.
 Ozone depletion.
 Process of Ozone depletion.
 Ozone Hole.
 Ozone depleting Substances.
 Effect of Ozone Depletion.
 Preventions.
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Layers of the Environment--
The atmosphere is divided into five layers. It is thickest near the surface and
thins out with height until it eventually merges with space.
1.Troposphere- is the first layer above the surface and contains half of the Earth’s
atmosphere. Weather occurs in this layer.
2.Stratosphere- is very stable ,many jet aircrafts fly in it. Also, the ozone layer
absorbs harmful rays from the sun.
3.Mesosphere- Meteors or rock
fragments burn up in the mesosphere.
4.Thermosphere- is a layer with
auroras. It is also where the space
shuttle orbits.
5.Exosphere- this is the upper limit of
our atmosphere. The atmosphere
merges into space in the extremely thin
exosphere.
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5. The Sun’s Ultraviolet Rays
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 The sun emits energy over a broad spectrum of wavelengths:
 Visible light that we see.
 Infrared radiation that you feel as heat.
 Ultraviolet (UV) radiation that we can’t see or feel.
 UV radiation has a shorter wavelength and higher energy than
visible light
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6. What is Ozone ?
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Ozone is a form of oxygen with 3 oxygen atoms (O3).
The oxygen we breath
has 2 atoms of oxygen (O2).
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7. Ozone is…
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 Ozone is
highly
corrosive and
toxic and is
used as a
disinfectant.
 It can be
found in small
concentrations
in the
troposphere
where it is
considered a
pollutant.
It is thinnest
around the
equator and
denser at the
poles.
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20. THANKS
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