## Background

Another fundamental physical constant named after Max Planck, Planck time is the time that it takes for light to travel the distance of one Planck length.

## Energy Wave Constants – Equivalent

The following is the representation of this fundamental physical constant expressed in energy wave theory. Using energy wave constants, its value was calculated and shown to match the known value in the Summary of Calculations table.

### Planck Time

The derivation of Planck time came from the current physics explanation as the square root of the reduced Planck constant (h bar) and gravitational constant G over c^{5}. However, why is c^{5} in the equation for the current explanation of Planck time? The square root would not produce units of seconds, so it must be hidden in h or G, thus these constants are not fundamental. Although no new explanation of Planck Time is given here, it will be assumed that it is the smallest unit of time.

**Calculated Value: **5.3912E-44

**Difference from CODATA:** 0.000%

**Calculated Units**: s (time in seconds)

The complete derivation of this constant is available in the Fundamental Physical Constants paper.

## Alternative Derivation

An alternative version after substituting for δ_{Ge }and O_{e}.

## Relationship to the Fine Structure Constant

Some of the derivations of the wave energy equations appear to be complex, yet their calculations match the known CODATA value. This is one of the energy wave constants that has a connection to the fine structure constant that simplifies the equation and provides some meaning to the constant itself.

Planck time is another constant that is complex until related to the fine structure constant. When doing so, it shows similarities to Planck mass and Planck length.