Advertisements
Advertisements
Questions
Discuss briefly about Ultraviolet B.
Discuss briefly the following:
Ultraviolet B
Advertisements
Solution 1
Ultraviolet B is one of the three types of invisible light rays given off by the sun. Ultraviolet B penetrates the ozone layer in attenuated form & reaches Earth. This is more over the equator than the poles due to the thinning of the ozone shield over the equator. It causes skin cancer, reduces the rate of photosynthesis in phytoplankton, and reduces the diversity of the aquatic ecosystem.
Solution 2
Ultraviolet-B is an electromagnetic radiation that has a shorter wavelength than visible light. It is a harmful radiation that comes from sunlight and penetrates through the ozone layer onto the Earth’s surface. It induces many health hazards in humans. UV-B damages DNA and activates the process of skin ageing. It also causes skin darkening and skin cancer. High levels of UV-B cause corneal cataract in human beings.
APPEARS IN
RELATED QUESTIONS
Explain the relationship between CFC’s and Ozone in the stratosphere.
Why ozone hole forms over Antarctica? How will enhanced ultraviolet Radiations affect us?
Name the pollutant attributed to be the cause of ‘ozone-hole’ over the Antarctica region.
State the role of the following chemicals in the food industry:
(i) Sodium benzoate
(ii) Aspartame
Choose the correct options of the following question:
Montreal Protocol aims at:
Why does a large ozone hole develop specifically over Antarctica?
The lens in the human eye is ______.
The main atmospheric layer near the surface of earth is ______.
Which of the following statements about ozone is CORRECT?
Increased skin cancer and high mutation rate are the results of ______.
Good ozone is found in upper part of atmosphere called ______.
Dobson units are used to measure the thickness of ______.
Choose the incorrect statement:
What do you understand by Snow-blindness?
