The radiations absorbed by ozone are:
Ultraviolet rays
Understanding the Ozone Layer and Radiation
The Earth's atmosphere has several layers, and one of the important layers is the stratosphere, where the ozone layer is found. The ozone layer is a region containing a high concentration of ozone molecules (\(O_3\)). This layer plays a vital role in protecting life on Earth.
Ozone and Radiation Absorption
The Sun emits various types of electromagnetic radiation, including visible light, infrared radiation, ultraviolet radiation, X-rays, and gamma rays. When this radiation travels through the Earth's atmosphere, different components of the atmosphere absorb different types of radiation.
The ozone molecules in the ozone layer are particularly effective at absorbing certain types of radiation from the Sun. The radiation primarily absorbed by the ozone layer is ultraviolet (UV) radiation.
Types of UV Radiation
Ultraviolet radiation is classified into different types based on wavelength:
- UV-A (315-400 nm): Mostly reaches the Earth's surface.
- UV-B (280-315 nm): Partially absorbed by the ozone layer.
- UV-C (100-280 nm): Almost completely absorbed by the ozone layer and other atmospheric gases.
The absorption of UV-B and UV-C radiation by ozone is crucial because these types of UV radiation are harmful to living organisms.
Why Absorption by Ozone is Important
Exposure to high levels of UV radiation, especially UV-B and UV-C, can cause significant damage to biological tissues. For example:
- It can lead to sunburn.
- It increases the risk of skin cancer.
- It can cause eye damage like cataracts.
- It can harm plants and marine life.
By absorbing a large portion of incoming UV radiation, the ozone layer acts like a shield, preventing most of the harmful UV rays from reaching the Earth's surface and protecting life below.
Other types of radiation like Gamma rays and X-rays are also absorbed by the upper layers of the atmosphere, but ozone is specifically known for its strong absorption of ultraviolet radiation.
Infrared rays are primarily absorbed by gases like water vapor and carbon dioxide in the lower atmosphere, contributing to the greenhouse effect.
Therefore, the radiations absorbed by ozone are primarily ultraviolet rays.
Important Questions from Ozone Layer Depletion
‘Dobson’ is the unit of measurement of:
Which layer protects us from the harmful UV rays of the sun?
Which one of the substances mentioned below is not responsible for the depletion of ozone layer?
Which among the following are Green House Gases (GHG)?
A. Surface ozone (O3)
B. Ammonia (NH3)
C. Methane (CH4)
D. Carbon monoxide (CO)
E. Nitrous oxide (N2O)
Choose the most appropriate answer from the options given below:
Montreal Protocol was signed to combat which of the following environmental issue?
