Definition

The process in which an atom or molecule loses an electron after absorbing light, resulting in the formation of ions.

Example

Photoionization is an important process in astrophysics and atmospheric chemistry.

Conversation

Have you ever heard of photoionization?

No, I haven't. What is it?

It's a process where photons ionize atoms or molecules.

That sounds interesting! I should look it up.

Synonyms & Antonyms

Root Explanation

Photoionization → It is formed from "photo-" (from Greek "phōs", meaning light) and "ionization" (from "ion" which comes from Greek "ion", meaning going or to go, combined with the suffix "-ization" which indicates a process). The word describes the process of ionization caused by light.

Memory Tip

Think of 'light' ('photo-') causing something to 'go' or change ('ionization') — that's why photoionization refers to the process of ionization due to light.

Visually Confused Words