Question

The radiations absorbed by ozone are:
1. Gamma rays
2. X-rays
3. Infra red rays
4. Ultraviolet rays 

Answer 1

Correct Answer - Option 4 : Ultraviolet rays 

The correct answer is Ultraviolet rays.

• 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 per cent 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.

• Greenhouse gases in the atmosphere absorb the infrared radiations of higher wavelengths and warm the atmosphere.
• Values of radiation absorbed by the greenhouse gases are as follow:

Gas	Value of absorption in percentage
Ozone (O3)	10.2 %
Methane (CH4)	16.3 %
Carbon Dioxide (CO2)	56.4 %
Nitro Oxide (NO2)	5.4 %