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

Objects are classified into two categories based on their ability to emit light:

• Luminous objects: These are objects that emit light of their own. Examples include the Sun, stars, a burning candle, and a glowing LED bulb.
• Non-luminous objects: These are objects that do not emit their own light. They are visible only when light from a luminous source falls on them and is reflected toward our eyes.

The Moon is a non-luminous object. It does not produce its own light; it shines because it reflects the sunlight that falls on its surface. Similarly, planets, buildings, and humans are non-luminous.