Multiple choice

Which of the following is the name given to bodies, which emit light of their own?

  1. Shadow

  2. Opaque body

  3. Luminous body

  4. Non-luminous body
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Luminous bodies emit their own light, like the sun or stars. Non-luminous bodies (like the moon or earth) reflect light but don't produce it. Opaque bodies don't allow light through, and a shadow is the absence of light. Only 'luminous' correctly describes light-emitting objects.

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