The emission or absorption of energy by an atom is represented by ∆E =

Explanation

The emission or absorption of energy by an atom is represented by: ∆E = hυ Where '∆E' is the energy difference between the initial and final states, 'h' is Planck's constant, and 'υ' is the frequency of the electromagnetic radiation emitted or absorbed. Planck's constant is a physical constant that relates the energy of a photon to its frequency. It is approximately equal to 6.626 × 10-34 joule-seconds.