Question

how lights formed? ​

Answer 1

light is small packet of energy called quanta it is form of energy which neither be created nor district it can change on form to another

so light energy is form by conversion of

heat energy, electrical energy etc

Answer 2

When the electron gains energy it moves to a higher energy level, then drops back to the ground state releasing its excess energy as light.The upper animation shows how blue (higher energy) light and the animation to the left shows how red (lower energy)light is created.