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Which one among the following is a non-luminous object ?

June 1, 2025 by rawan239

Which one among the following is a non-luminous object ?

Sun

Candle

LED bulb

Moon

This question was previously asked in

UPSC CISF-AC-EXE – 2021

Download PDF Attempt Online

A non-luminous object is an object that does not produce its own light. It is visible because it reflects light from a luminous source. The Moon does not produce its own light; it reflects sunlight.

Luminous objects emit light (e.g., Sun, candle flame, light bulb).
Non-luminous objects reflect light (e.g., Moon, planets, furniture, books).

The apparent brightness of non-luminous objects depends on the intensity of the incident light and their reflective properties.

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