How does the primary light mechanism of an emission nebula contrast with that of a reflection nebula?
Answer
Emission nebulae absorb UV energy and re-emit it at specific visible wavelengths
Emission nebulae utilize ionization and recombination (fluorescence) to produce light, whereas reflection nebulae shine because fine dust particles scatter existing stellar visible light, typically resulting in a blue appearance.
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How Does Ionization Cause Emission Nebulae To Glow? - YouTube
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