If a satellite’s orbit slowly decays in an upper atmospheric layer, what is the most suitable reason?
Answer and explanation
Correct answer: Slight drag by thermospheric gases
A low-orbit satellite travels through the extremely thin upper atmosphere. Even though thermospheric gas density is very small, collisions with those particles create aerodynamic drag, reducing orbital energy and gradually lowering the orbit. Solar activity can expand or heat the thermosphere and increase this drag. Thus option D is correct. Rain, monsoon, and sea fog are weather phenomena of much lower layers and cannot explain this orbital decay.
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What is the correct answer to this question?
Slight drag by thermospheric gases
Why is this the correct answer?
A low-orbit satellite travels through the extremely thin upper atmosphere. Even though thermospheric gas density is very small, collisions with those particles create aerodynamic drag, reducing orbital energy and gradually lowering the orbit. Solar activity can expand or heat the thermosphere and increase this drag. Thus option D is correct. Rain, monsoon, and sea fog are weather phenomena of much lower layers and cannot explain this orbital decay.
Which subject and chapter does this question cover?
This is a Class 11 Accountancy question. Chapter: Bills of Exchange.
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