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The ozone layer is a layer of gas molecules which is bombarded with rays from the sun. These are harmful UV rays and this ozone layer in present in the stratosphere.he photosphere is the visible part of the Sun's atmosphere. The parts of the sun's atmosphere from the surface outward are the photosphere, the chromosphere, the corona, and the outer layers of the corona called the solar wind.
The Ozone Hole. For nearly a billion years, ozone molecules in the atmosphere have protected life on Earth from the effects of ultraviolet rays. The ozone layer resides in the stratosphere and surrounds the entire Earth. UV-B radiation (280- to 315- nanometer (nm) wavelength) from the Sun is partially absorbed in this layer. As a result, the amount of UV-B reaching Earthâs surface is greatly reduced. UV-A (315- to 400-nm wavelength) and other solar radiation are not strongly absorbed by the ozone layer. Human exposure to UV-B increases the risk of skin cancer, cataracts, and a suppressed immune system.