UNIVERSE
THE SUN
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
Sunspots have a bright white appearance.
|
|
|
Sunspots occur in the radiation zone of the Sun.
|
|
|
Sunspots occur in areas of extremely low magnetic fields.
|
|
|
Sunspots have lower temperatures than their surroundings.
|
Detailed explanation-1: -Sunspots appear dark because they are cooler than their surroundings. Large sunspots are thousands of degrees cooler than the areas that surround them (about 4, 200 °C for a sunspot compared to 6, 000 °C for the photosphere surrounding it).
Detailed explanation-2: -As well as being a darker area on the sun, a sunspot is an area that temporarily has a concentrated magnetic field. This magnetic force inhibits the convective motion, which ordinarily brings hot matter up from the interior of the sun, so the area of the sunspot is cooler than the surrounding plasma and gas.
Detailed explanation-3: -Sunspots are dark, planet-size regions of strong magnetic fields on the surface of the sun. They can spawn eruptive disturbances such as solar flares and coronal mass ejections (CMEs). These regions of the sun appear darker because they are cooler than their surroundings.
Detailed explanation-4: -Sun spots are the darker, cooler areas that are present on the surface of the Sun in a region called the photosphere. They are the regions where the magnetic field is about a thousand times greater than that of the Earth. The photosphere has a temperature of about Kelvins.