GK
WORLD GEOGRAPHY
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
9600 km above the earth’s surface
|
|
|
8000 km above the earth’s surface
|
|
|
64,000 km above the earth’s surface
|
|
|
None of the above
|
Detailed explanation-1: -The Magnetosphere, which lies beyond the exosphere, is the Earth’s magnetic belt, where protons and electrons coming out from the Sun are trapped. The magnetic field of Earth extends to around 64, 000 km above the Earth. Near the North or South Pole, one can enjoy ecstatic cosmic shows in the sky called auroras.
Detailed explanation-2: -As the largest structure in the solar system, the magnetosphere is about 21 million kilometers (12 million miles) wide. That’s 150 times wider than the planet itself and almost 15 times wider than the sun. If the magnetosphere were visible from Earth, it would appear as big as the moon.
Detailed explanation-3: -Generated by the motion of molten iron in Earth’s core, the magnetic field protects our planet from cosmic radiation and from the charged particles emitted by our Sun. It also provides the basis for navigation with a compass.