Physics · Solar Atmosphere
Why do coronal holes appear darker than their surrounding areas in solar images?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1They act as thermal insulating layers preventing energy from escaping the core.
- 2They are regions where the solar magnetic field lines completely close loop-like structures.
- 3They are cooler, less dense regions characterized by open magnetic field lines.✓
- 4They are composed of heavy elements that completely absorb ultraviolet light.
Correct answer
They are cooler, less dense regions characterized by open magnetic field lines.
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