Which of the following radiations emanating from sun is absorbed by the ozone layer present in the Earth's atmosphere?

Option 2 : UV-B radiations

The correct answer is option 2, i.e UV-B radiations.

• The stratosphere includes the zone termed the ‘ozone layer’.
• Ozone in the stratosphere plays a very different role to that in the layer below.
• In the ozone layer, it is often referred to as ‘good’ ozone since it plays a crucial role in absorbing potentially dangerous ultraviolet (UV-B) radiation from the sun.
• The ozone layer typically absorbs 97-99 percent of incoming UV-B radiation.
• Higher concentrations of ozone in the stratosphere is therefore crucial to ensure life (including humans) at Earth’s surface are not exposed to harmful concentrations of UV-B radiation.