Consider the following statements regarding structure of the atmosphere:1. Radio waves transmitted from the earth are reflected back to the earth by mesosphere.2. Ozone layer is found in Stratosphere.3. Temperature in mesosphere is decreases with increase in height.Choose the correct answer from below given codes:

Q. Consider the following statements regarding structure of the atmosphere:
1.Radio waves transmitted from the earth are reflected back to the earth by mesosphere.
2.Ozone layer is found in Stratosphere.
3.Temperature in mesosphere is decreases with increase in height.
Choose the correct answer from below given codes:

[A] 1 and 2 only

[B] 3 only

[C] 2 and 3 only

[D] 2 only

Answer: C

Notes:

Explanation: The stratosphere is found above the tropopause and extends up to a height of 50 km. One important feature of the stratosphere is that it contains the ozone layer.

This layer absorbs ultra-violet radiation and shields life on the earth from intense, harmful form of energy. The mesosphere lies above the stratosphere, which extends up to a height of 80 km.
In this layer, once again, temperature starts decreasing with the increase in altitude and reaches up to minus 100° C at the height of 80 km. The upper limit of mesosphere is known as the mesopause.
The ionosphere is located between 80 and 400 km above the mesopause. It contains electrically charged particles known as ions, and hence, it is known as ionosphere.
Radio waves transmitted from the earth are reflected back to the earth by this layer. Temperature here starts increasing with height.

Source: NCERT – Fundamental of Physical Geography

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