I apologize for the confusion caused by my previous response. The equation you mentioned involving momentum (p), energy (E), the speed of light (c), and Planck's constant (h) is not part of the standard special relativity framework.
In special relativity, the relationship between momentum and energy is given by the equation:
E^2 = (pc)^2 + (mc^2)^2
where m is the rest mass of the object, c is the speed of light, p is the momentum, and E is the total energy.
Planck's constant (h) is a fundamental constant in quantum mechanics and plays a crucial role in the theory of quantum mechanics, specifically in the context of the wave-particle duality of particles and the quantization of energy levels. However, it does not directly enter the equation relating momentum and energy in special relativity.
Again, I apologize for any confusion caused, and I appreciate your understanding.