Question

Where is over 95% of incoming ultraviolent radiation absorbed

A. The stratosphere
B. The mesosphere
C. The troposphere
D. The thermosphere

Answer 1

Over 95% of incoming ultraviolet radiation is absorbed in :

A. The Stratosphere.

Step-by-step explanation:

• Stratosphere is the second layer of the earth's atmosphere that lies next to the troposphere.
• This layer experiences very little turbulence of air and is very significant because of the presence of Ozone layer in it.
• The UV rays entering the Earth's atmosphere, photo dissociates ozone into O₂ and O. But these molecules quickly recombine to form ozone.Thus, stabilizing the concentration of ozone in the atmosphere.
• During this photo dissociation UV radiations loses much of its energy. Thus, 95% of incoming Ultraviolet radiation gets absorbed in the Stratosphere.
• Absorption of ozone UV radiation increases exponentially with the thickness of ozone layer.