Greek Letter Alpha (Άλφα - Α)
A is the first letter of the Greek alphabet and it derives from the Egyptian hieroglyphic for a horned ox's head, by way of the semitic "aleph", which today doesn't look at all ox-like. Contemporary "A", like its Greek ancestor, has the horns pointed downward.
"A" Letter in mathematics and in science
- the first angle in a triangle.
- one root of a quadratic equation, β represents the other
- the statistical significance of a result
- the false positive rate in statistics
- the fine structure constant in physics which characterizes the strength of the electromagnetic interaction
- Alpha particles that consist of two protons and two neutrons bound together into a particle identical to a helium nucleus; (He+2)
- Angular acceleration in physics
- the linear thermal expansion coefficient
Greek words with "α"