Question

Which of the following is an example of the self luminous body?
A) Sun
B) Moon
C) Electric bulb
D) Earth

Answer 1

Hint
The words self luminous bodies are those bodies that produce light of their own or simply it can be said as those bodies which generate heat on their own and glow using their own light.

Complete step-by-step answer:
As we all that many of the bodies glow using heat of the other source and moon is the simplest example or natural example we can take.
Moon takes the sun’s light to glow during the night; the moon does not have its own source to prepare heat.
Earth is also not the example of the luminous bodies.
When we are talking about electric bulbs it takes electrical energy to glow, It itself does not glow when the switch is off.
So in case of the sun, It can be called a self luminous body because due to maximum amount of presence of hydrogen, sulphur like gases it leads to the formation of light hence sun do not require any source to glow.
Lots of reactions happen which helps the sun to generate its own light. Option (A) is correct.

Note
Hence we can say that not only the sun but the entire star can be said as a self luminous body. There are many stars outside the solar system which are much bigger than the sun. To find the distance of the stars which are so much farther than our solar system we use the unit ‘light year to measure the distance from the earth.