Question

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

Answer 1

This is a theoretical problem. The definition of the luminous body should be known to solve this problem. A luminous body is a body that shines on its own. Thus, using this, we will find the luminous body from the options listed above.

Complete answer:
The luminous body is a body that shines using its own light or in simple words, a luminous body can be defined as a shining body. The naturally luminous body is different from that of the artificial luminous body. The natural luminous body is a body that shines on its own, whereas, the artificial luminous body is a body that makes use of the external source. From the given options, we have a burning candle, earth, moon and a tree.
The burning candle is an artificial luminous body, as it makes use of the external source to laminate. Here the external source is a match stick. The planet earth is a non luminous body, as it doesn’t shine. The moon is a natural satellite of the earth, and this is a luminous body. Even though the moon makes use of the sunlight to shine, it’s considered as the natural luminous body. A tree is a non luminous body.

So, the correct answer is “Option C”.

Note: Not only the definition of the luminous body but also the properties of the luminous body should be known to solve this problem. Because the options given may confuse the student regarding the self luminous body and the body that starts to shine using the external source.