Question

State whether true or false.
The outer rim of the sun which is only visible in an annular solar eclipse is called corona.
a) True
b) False

Answer 1

Hint : The Sun's corona is the external part of the Sun's environment. The corona is typically hidden by the bright glow of the Sun's cover. That makes it hard to see without utilizing special devices. However, the corona can be observed during a complete solar eclipse.

Complete step-by-step solution:
Our Sun is enclosed by a jacket of gases described as an atmosphere. The corona is the external part of the Sun's atmosphere. While a total solar eclipse, the moon moves between Earth and the Sun. When this occurs, the moon prevents out the bright shine of the Sun. The bright white corona can then be viewed encircling the eclipsed Sun.
The corona's large temperatures are a bit of a secret. Imagine that we are sitting near a campfire. It is delicate and warm. However, when we walk apart from the fire, we feel more comfortable. This is the reverse of what appears to occur on the Sun.
Astronomers have been attempting to solve this puzzle for an extended period. The corona is in the outside layer of the Sun's environment—far from its cover. However, the corona is hundreds of times warmer than the Sun's cover.
The corona stretches far out into location. From it develops the solar wind that moves through our solar system. The corona's temperature creates its particles to travel at tremendous speeds. These speeds are so great that the particles can leave the Sun's gravity. A corona is an atmosphere of plasma that encloses the Sun and other stars. The Sun's corona spreads millions of kilometres into external space and is most easily observed during a total solar eclipse,
The corona is not ever evenly distributed across the covering of the Sun. Meanwhile, in quiet periods, the corona is higher or short confined to the tropical regions, with coronal holes comprising the polar regions. However, during the Sun's current periods, the corona is uniformly distributed over the tropical and polar regions, though it is most extended in areas with sunspot action.
So, the given statement is true.
Option (a) is correct.

Note: Since the solar magnetic field is constantly covered up due to the quicker rotation of mass at the Sun's tropics, sunspot activity will be more noticeable at solar maximum where the magnetic field is more bent. Compared with sunspots are coronal circles, rings of magnetic flux, upwelling from the solar inside. The magnetic flux exerts the hotter photosphere down, revealing the cooler plasma below, thus producing relatively dull sunspots.