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### Frequency

A frequency ν is the number of occurrences of a repeating event per unit of time.

##### Explanation

There is always a precise frequency determined by a particle, which is directly proportional to its mass

where

mRest mass cSpeed of light hPlanck constant

You can calculate this by combining Planck's quantum relation

with Einstein's mass-energy relation

##### Comment

The frequency is the reciprocal of the period duration.