Eta is the seventh letter of the Greek alphabet. In the system of Greek numerals it has a value of 8. The lower-case letter is used as a symbol in many sciences including thermodynamics,chemistry,optics,physics and mathematics. The Greek alphabet has an important role in the nomenclature of astronomical bodies and subatomic particles | |
Lizenzart: | Lizenzfrei |
Credit: | Science Photo Library / Parker, David |
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