Photoexcitation

Photoexcitation is the production of an excited state of a quantum system by photon absorption.

The excited state originates from the interaction between a photon and the quantum system.

In contrast to that, light with shorter wavelengths emit photons with more energy.

When the photon interacts with a quantum system, it is therefore important to know what wavelength one is dealing with.

The absorption of the photon takes place in accordance with Planck's quantum theory.