TFNR - Fundamental Constants of Nature

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The constants of Nature are fundamental invariant quantities. They are used in the basic equations that describe the fundamental physical phenomena.

The main constants are:

• velocity of light in vacuum (c)
• the charge of the electron
• the absolute value of which is the fundamental unit of electric charge (e)

+the mass of the electron (me)

• Planck's constant (h)
• the fine-structure constant, symbolized by the Greek letter alpha