In the greek language what is difference between omega and omicron?

The difference between omega (Ω) and omicron (Ο) in Greek lies solely in their pronunciation and, consequently, their meaning:

* Omicron (Ο): Represents a short "o" sound, similar to the "o" in "cot" or "hot."

* Omega (Ω): Represents a long "o" sound, similar to the "o" in "boat" or "go."

Essentially, they are the same vowel but with different lengths, a distinction crucial in Ancient Greek where vowel length affected word meaning. In Modern Greek, the length distinction is less crucial, but the letters remain distinct.