Question
Q. The phenomenon of Aurora Borealis, the display of red and green lights in the northern hemisphere, is due to radiations in which one of the following layers?
Answer: Option D
:
D
Explanation:
The luminous effect of electro-magnetic phenomena in the ionosphere is known as Aurora, visible in high latitudes as red, green and white arcs, draperies, streamers, rays and sheets in the night sky, best developed at a height of about 90 kms, i.e, the ionosphere. Probably, the aurora is the result of magnetic storms and of electrical discharges from the sun during periods of sun-spot activity, causing ionization of gases, though this is still a matter of research.
It is called the Aurora Borealis (or northern lights) in the northern hemisphere and the Aurora Australis in the southern hemisphere.
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:
D
Explanation:
The luminous effect of electro-magnetic phenomena in the ionosphere is known as Aurora, visible in high latitudes as red, green and white arcs, draperies, streamers, rays and sheets in the night sky, best developed at a height of about 90 kms, i.e, the ionosphere. Probably, the aurora is the result of magnetic storms and of electrical discharges from the sun during periods of sun-spot activity, causing ionization of gases, though this is still a matter of research.
It is called the Aurora Borealis (or northern lights) in the northern hemisphere and the Aurora Australis in the southern hemisphere.
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