Question

How do emission and reflection nebulae differ?(1 point)
Responses

contain remnants of stars
contain remnants of stars

hard line edges
hard line edges

interactions with light
interactions with light

the presence of young stars
the presence of young stars
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Answer 1

interactions with light

Emission nebulae glow from ionized gas (they emit light, often red Hα) while reflection nebulae shine by scattering starlight (usually blue).