$ Porat's planck photon synonym, 1*h*f / c^2
Here, Porat's multiplying by one (1) ..makes it HiS mass.!!
Well, h = 6.6*10^-34 J s and c = 3.0*10^8 m/s,
so h/c^2 = 7.3*10^-51 kg s.
Inserting f as 1 Hz is left as an exercise to the reader.
STANDARD SI frequency, f = 1*Hz = 1 / STANDARD unit second.
```Brian >><> >><> >><> >><> >><>
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