The particle of light emitted when at atom changes from a higher energy level to a lower energy level is called

Photon

Explanation:

The photon is the quantum of light. From a classifical point of view, ligth is a wave (an electromagnetic wave), but it also acts as made by particles (quanta of energy) called photons, and this behaviour is described by quantum mechanics.

When an atom changes from a higher energy level to a lower energy level, energy is released in the transition. This energy is carried away by a single photon of light. More specifically, the photon carries an energy which is equal to the difference in energy between the two levels of the atom:

And the frequency of the photon will depend on its energy, according to the equation

where

E is the photon's energy

h is the Planck constant

f is the photon's frequency

as we probably am aware that our atmosphere or air have various levels, each level has different gasses, and each gas has another porousness. at the point when the light originates from lower porousness to higher penetrability, it alters its course. with the goal that implies that when the light originates from the moon to the earth, it alters it's course a lot more occasions. it essentially implies that the state of the light piece of the moon is changed on the earth.

not copied too! hope this !

joke:

h o h o hope you have a merry christmas!