Group B Luminous Objects

A luminous object is one that gives off light. In other words, it glows of its own accord
The sun, pulsars, black holes and stars are luminous objects but the moon is really non luminous.

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To be able to glow, the object must have its own source of energy. A torch shines because of the energy stored in its batteries, whereas all stars shine using energy created by nuclear fusion. Both of these are considered to be luminous objects.

In order for us to see an object that is non-luminous, it must reflect some of the light it receives from a luminous source

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