Plages

Definition

Plages are bright regions in the chromosphere of the Sun, typically found near sunspots. They are areas of higher temperature and density compared to their surroundings.

5 Must Know Facts For Your Next Test

1. Plages appear brighter because they are hotter and denser than the surrounding chromosphere.
2. They are closely associated with magnetic activity on the Sun, often appearing near sunspots.
3. Plages can be observed in certain wavelengths of light, particularly those emitted by ionized calcium and hydrogen.
4. These regions contribute to solar radiation and can influence space weather affecting Earth.
5. The term 'plage' comes from the French word for 'beach,' reflecting their appearance as bright patches.

Review Questions

Related terms

Sunspot: A cooler, darker region on the photosphere of the Sun caused by magnetic activity.

Chromosphere:

The second layer of the Sun's atmosphere located above the photosphere and below the corona.

Solar Flare:

A sudden eruption of intense high-energy radiation from the Sun's surface associated with sunspots and magnetic activity.