Question

Which of the following is a luminous body?
(A) A burning candle
(B) Earth
(C) Moon
(D) Tree

Answer 1

The luminous body is the body that produces the light on their own. The sun is the natural luminous body and it is the chief source of the light. The light is visible to the human eye by the process of reflection by the objects in the environment.

Complete step by step answer:
Let us consider the given options. The burning candle burns its own waxes to produce the light and hence it emits its own light. Thus the burning candle is the luminous body. It is known that the earth does not emit any light of its own. So it is non- non-luminous body. The moon is also non-luminous in nature.

The white light from the moon that we see from the earth is not produced by its own but it is the light that is obtained from the sun and reflected to the earth. Hence the white light from the moon is the reflection of the only small part of the sunlight. The tree is also the non- luminous body. From the above explanation, it is clear that the burning candle is the only luminous body.

Thus the option (A) is correct.

Note: All the stars are the luminous bodies that produce the light on their own. The sun is also the type of the star and the earth gets the light from it. The other example of the luminous body is the firing of the wood, manmade tube light and the other source of light etc.