The Luminous Object is-
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → Sun
A luminous object gives out light of its own; a non-luminous object is seen only because it reflects light that falls on it. The Sun produces its own light (and heat) by nuclear fusion, so it is luminous.
Why the other options are incorrect
Option (1) Gold — Incorrect. Gold shines only because it reflects light well; in the dark it cannot be seen.
Option (2) Earth — Incorrect. The Earth is a planet with no light of its own; it is lit by the Sun.
Option (3) Moon — Incorrect. Moonlight is sunlight reflected from the Moon’s surface.