Question

Give Reason
1) Mesosphere is the coldest layer of the atmosphere
2) In stratosphere, temperature increases with height
3) Communication satellites can orbit around the Earth in Thermosphere
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Answer 1

1.The mesosphere is the coldest layer because it has essentially nothing to heat it. The atmosphere is primarily heated from below, and the troposphere is warmed by that mechanism. The stratosphere is colder, but ozone in the upper stratosphere absorbs enough radiation to warm it.

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2.The pattern of temperature increase with height in the stratosphere is the result of solar heating as ultraviolet radiation in the wavelength range of 0.200 to 0.242 micrometre dissociates diatomic oxygen (O2).

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3.It is called the thermosphere because temperatures can reach up to 1,500 degrees Celsius (2,732 degrees Fahrenheit). However, despite the high temperatures, the pressure is very low, so satellites don't suffer heat damage.

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