Question

Which of the following object is luminous?

• A. Moon
• B. Planets
• C. Sun
• D. Earth

Answer 1

The correct option is C

Sun

Explanation of correct option:

Option C,

Luminous objects are objects which emit light on its own.

1. Sun is an object which emits light.
2. It produces heat and light through nuclear fusion happening in its core.

Sun is a luminous object.

Explanation of incorrect option

Option A,

1. Moon reflects light from the sun.
2. It does not have any light of its own.
3. Therefore, moon is not a luminous object.

Option B,

1. Planets do not emit light.
2. Planets are visible due to the reflection of the sun's light from it.
3. So, planets are not luminous objects.

Option D,

1. Just like the other planets, the earth also does not emit light.
2. Earth reflects the light of the sun that falls on it.
3. Earth is not a luminous object.

Therefore option C is correct.