Question

Select the luminous and nonluminous objects from the following. Candle flame, star, moon, red hot wire of heater, polished surface, a bulb, candle.

Answer 1

1. Luminous objects are those which have the light of their own.
   Luminous objects: Candle flame, star, red hot wire of heater, and a bulb.
2. Nonluminous objects are those which don't have the light of their own.
   Nonluminous objects: Moon, polished surface, and candle.