Which one of the following gases is transparent to incoming solar radiation and opaque to outgoing terrestrial radiation?

Which one of the following gases is transparent to incoming solar radiation and opaque to outgoing terrestrial radiation? Correct Answer Carbon dioxide

The correct answer is Carbon dioxide.

Key Points

Carbon Dioxide:

  • Carbon dioxide is meteorologically a very important gas.
  • It is transparent to the incoming solar radiation but opaque to the outgoing terrestrial radiation.
  • It absorbs a part of terrestrial radiation and reflects back some part of it towards the earth’s surface.
  • It is largely responsible for the greenhouse effect.
  • The volume of other gases is constant but the volume of carbon dioxide has been rising in the past few decades mainly because of the burning of fossil fuels.
  • This has also increased the temperature of the air.

​Thus, carbon dioxide is transparent to incoming solar radiation and opaque to outgoing terrestrial radiation.

Composition of the atmosphere:

  • The air we take in while breathing is actually a mixture of many gases.
  • Nitrogen and oxygen are two gases that make up the bulk of the atmosphere.
  • Carbon dioxide, helium, ozone, argon and hydrogen are found in lesser quantities.
  • Apart from these gases, tiny dust particles are also present in the air. 
  • These dust particles present in the air are commonly referred to as aerosols.

The atmospheric composition of gases by volume are as follow:

Permanent Gases of the Atmosphere

Constituent

Percent by Volume

Nitrogen (N2)

78.084

Oxygen (O2)

20.946

Argon (Ar)

0.934

Carbon dioxide (CO2)

0.036

Neon (Ne)

0.00182

Helium (He)

0.000524

Krypton (Kr)

0.000114

Hydrogen (H2)

0.00005

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