• Question: When we pass current through an atom, the electrons of the atom then have wider orbits around the nucleus of the atom. In order to stabilise their orbits the electrons have to release tiny units of energy called photons. Is that exact? If it is can you explain more to me about photons?

    Asked by THE SCIENTIST to Julio on 15 Nov 2016.
    • Photo: Julio Gutierrez

      Julio Gutierrez answered on 15 Nov 2016:

      Thank you for such a nice question. When an electron receives energy from an external source, it may promote to higher energy levels. When the electron falls back to a lower energy states, a photon is emitted. Photons are particles which transmit light. In other words, light is carried over space by photons. The energy of the photon is equal to the energy difference between the lower and the higher energy levels.