<<The photon mass is hf/c².>>
The equation 'hf/c²' results in the derived unit 'J/(m/s)²' this unit does not align with the standard unit of mass, which is kilograms (kg). Therefore, 'hf/c²' doesn't directly convey mass as we understand it.
Einstein's famous equation E = mc² where E is energy, m is mass, and c is the speed of light. By rearranging this equation, mc²/c² = m, it's apparent that 'hf/c²' cannot be directly interpreted as mass because mass cannot straightforwardly convert from electromagnetic radiation (hf) into frequency (f).
Therefore the proposition 'photon mass is hf/c²' is dismissed.
- Soumendra Nath Thakur
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