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Ozone shields the surface of the earth from ______
1. Solar rays
2. Infrared rays
3. Ultraviolet radiation
4. Greenhouse gases
5.

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Correct Answer - Option 3 : Ultraviolet radiation

The correct answer is Ultraviolet radiation.

  • Solar rays are also known as sun rays.
    • Solar rays can be seen when sunlight passes past sharply defined clouds (like cumulus clouds) when the atmosphere is slightly dusty or hazy.
    • Light is scattered by the aerosols and the light paths past the clouds become visible.
  • Infrared, sometimes called infrared light, is an electromagnetic radiation with wavelengths longer than visible light.
    • It is therefore invisible to the human eye.
    • Infrared is generally understood to encompass wavelengths from the nominal red edge of the visible spectrum around 700 nanometers to 1 millimeter.
  • Ultraviolet is a form of electromagnetic radiation with a wavelength from 10 nm to 400 nm, shorter than that of visible light, but longer than X-rays.
    • UV radiation is present in sunlight and constitutes about 10% of the total electromagnetic radiation output from the Sun.
  • A greenhouse gas is a gas that absorbs and emits radiant energy within the thermal infrared range, causing the greenhouse effect.
    • The primary greenhouse gases in Earth's atmosphere are water vapor, carbon dioxide, methane, nitrous oxide, and ozone.

  • The ozone layer or ozone shield is a region of Earth's stratosphere that absorbs most of the ultraviolet radiation coming from the sun.
  • It contains a high concentration of ozone (O2) in relation to other parts of the atmosphere, although still small in relation to other gases in the stratosphere.
  • The ozone layer contains less than 10 parts per million of ozone, while the average ozone concentration in Earth's atmosphere as a whole is about 0.3 parts per million.
  • The ozone layer is mainly found in the lower portion of the stratosphere, from approximately 15 to 35 kilometers above Earth, although its thickness varies seasonally and geographically.

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