Civil Services UPSC CAPF (Assistant Commandants) Test Series 2025 Current Affairs Science and Technology
In the context of solar physics, which of the following statements best describes the term "coronal heating problem"?
1
The observation that the Sun's corona is cooler than the photosphere , which contradicts the expected temperature gradient.
2
The observation that the Sun's photosphere is much cooler than the corona.
3
A phenomenon where the Sun's corona emits less energy than the photosphere despite being hotter.
4
The idea that the corona is heated by magnetic fields but the exact mechanism remains unknown.