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The altitude range of thermosphere is ___________

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The altitude range of thermosphere is ___________

(a) 50km to 400km

(b) 90km to 500km

(c) 100km to 300km

(d) 70km to 400km

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This is a very interesting question from Vertical Development of Air topic in chapter Atmosphere and Air Data Measurement of Aircraft Performance

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The correct choice is (b) 90km to 500km

Easiest explanation: The altitude range of thermosphere is 90km to 500km. Thermosphere is present between mesosphere and exosphere. The range of temperature in thermosphere is 200-2000°C. The temperature varies from day and night, during night its 200°C and during day it’s 200°C. The upper thermosphere extends up to a temperature of 2000°C.

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