When we view the Sun's disk in visible light,we see less deeply into the Sun near the limb than at the center of the disk because of the interaction of the light with atoms of the gas.What conclusion can be drawn from the observation that the Sun appears less bright near the limb than it does at the disk center?

Question

Quizplus · Accepted Answer

The observation that the Sun appears less bright near the limb than at the center of the disk suggests that the temperature of the gas falls with increasing height in the solar atmosphere. This is because the gas at the limb is seen through more of the solar atmosphere, and because the gas is cooler at higher altitudes.

When We View the Sun's Disk in Visible Light,we See