Question

Discuss briefly about Ultraviolet B.

Discuss briefly the following:

Ultraviolet B

Answer 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.

Answer 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.