Q1. Aurora Australis ( Southern Lights)- 6 marks 50 words or 12 marks 150 words
Luminous phenomenon of Earth's upper atmosphere that occurs primarily in high latitudes of both hemisphere.
In the Northern Hemisphere auroras are called aurora borealis/aurora polaris/northern lights, and in the Southern Hemisphere they are called asaurora australis/ southern lights.
Why they occur?
They are caused by high-energy particles from the Sun cascading down on Earth. As they near our planet, they interact with Earth's magnetic field, which channels them toward the north and south magnetic poles.
Positive effects:
It attracts tourists and helps in revenue inflow to economy.
It can help in generation of power up to 10 million MW.
They are magical to watch. It is said to have therapeutic effects on humans.
Negative effects:
GPS signals,power lines,
Power back up systems like Batteries gets affected.
The radiation from aurora is said to have effect on plant and animal life.
The charges released from it affects the environment inside space stations and satellites in the orbit.