Question

Name of highest clouds in the atmosphere that can be seen with naked eye?
(A) Oxygenous clouds
(B) Nitrogenous clouds
(C) Helium clouds
(D) Noctilucent clouds

Answer 1

Hint:The major layers of earth’s atmosphere includes troposphere, stratosphere, mesosphere, thermosphere and exosphere. Most of the clouds generated by the earth’s weather are found in the troposphere. The stratosphere is also nearly cloudy. The highest clouds in earth atmosphere are seen in the mesosphere.

Complete step by step answer:
The five major layers in the earth’s atmosphere are given below:
Troposphere
Stratosphere
Mesosphere
Thermosphere
Exosphere
The densest layer of atmosphere is the troposphere. Most of the clouds formed by weather are found in the troposphere. The ozone layer is seen in the stratosphere. The stratosphere is nearly cloudy.
The highest clouds in the atmosphere which can be viewed by the naked eye are seen in the mesosphere.
Noctilucent clouds are the highest clouds that can be seen through our naked eye.
These noctilucent layers are found in the mesosphere.
The correct option is (D) noctilucent clouds.

Additional Information
The thermosphere is free of clouds and water vapour.
It is due to the very little amount of water vapour present in the mesosphere that the noctilucent clouds are formed.
Noctilucent clouds are formed at high altitude. Thus these clouds are not visible at every time.


Note:
Noctilucent clouds are the highest clouds that can be seen through our naked eye. They look like golden-white streaks. They cannot be seen every night. These clouds can be seen mainly in summer seasons. The term ‘nocti’ means night and ‘lucent’ means shining. Since these clouds are at high altitude, it is not visible every time. They are illuminated by the sun at the time of sunset. Thus it got the name noctilucent.