Question

How is light formed?

Answer 1

Hint: You could give a brief idea about what light is. Then you could explain the formation of light at an atomic level. You may be familiar with the excitation of atoms between different energy levels and the light formation is directly related to this process. Then, you could also explain light being a part of the electromagnetic spectrum.

Complete answer:
In the question, we are asked about the formation of light.
At the atomic level, the light formation could be explained something like this.
As we all know atoms form the fundamental particle of everything. Light formation at atomic level is basically a three step process.
Initially they begin from the stable ground state with electrons at their actual position. Now when they absorb energy, these electrons jump into higher energy levels which changes the state of the atom from rest to excited. This unstable excited atom tends to move back to its stable ground state. This step however results in the release of photons of certain energy. Thus, we saw how light is created at atomic level.

Additional information:
We know that visible forms that part of the spectrum of electromagnetic radiation that is perceivable to the human eye. The wavelength range of visible light is found to be, 400nm-700nm. Sun acts as the main source of light on our planet Earth.

Note:
It is a known fact that the light is a form of electromagnetic radiation that is produced as the result of atoms being heated up. They are known to consist of photons. It propagates in the form of a wave and is known to have all the properties of a wave like wavelength, frequency, etc. The speed of light in vacuum is considered as a universal constant which has value,
$c=3\times {{10}^{8}}m{{s}^{-1}}$