In which layer can density changes due to increased solar activity affect satellite drag?
Answer and explanation
Correct answer: Thermosphere
Option A is correct because enhanced solar ultraviolet and extreme-ultraviolet energy heats and expands the thermosphere. Expansion increases the density of the upper atmosphere at satellite altitudes, even though that density remains very small compared with air near the ground. Increased density produces greater aerodynamic drag, which can lower a low-Earth satellite’s orbital altitude and require correction. The lower-atmosphere options are not relevant.
Frequently asked questions
What is the correct answer to this question?
Thermosphere
Why is this the correct answer?
Option A is correct because enhanced solar ultraviolet and extreme-ultraviolet energy heats and expands the thermosphere. Expansion increases the density of the upper atmosphere at satellite altitudes, even though that density remains very small compared with air near the ground. Increased density produces greater aerodynamic drag, which can lower a low-Earth satellite’s orbital altitude and require correction. The lower-atmosphere options are not relevant.
Which subject and chapter does this question cover?
This is a Class 11 Accountancy question. Chapter: Bills of Exchange.
