Relativistic Pressure Calculator

Relativistic pressure, as found in quantum mechanics and astrophysics, particularly in the study of neutron stars, is an essential concept that integrates quantum physics and special relativity. This tutorial explores the associated calculations and formulas based on the Planck constant, neutron mass, and density.

Relativistic Pressure Calculator
Relativistic Pressure Calculator Results
Relativistic Pressure = N/m2

Please provide a rating, it takes seconds and helps us to keep this resource free for all to use

[ 1 Votes ]

Example Formula

The formula for the relativistic pressure (P) in a neutron star can be approximated as:

P = h2/(20π2mn) × (3π2ρ) 5/3
  1. P: This is the relativistic pressure.
  2. h: This is the reduced Planck constant, also known as Dirac's constant.
  3. mn: This is the neutron mass.
  4. ρ: This represents the neutron density.

Who wrote/refined the formula

This formula is based on quantum mechanics and the theory of relativity, which were introduced and refined by many physicists over the years. The most noteworthy among them are Max Planck, who introduced the Planck constant, and Albert Einstein, whose theory of relativity forms the basis for calculating relativistic pressure.

Real Life Application

The concept of relativistic pressure is particularly essential in astrophysics, where it's used to describe the internal pressure of neutron stars. Neutron stars are dense astronomical objects formed from collapsed stars, and understanding their internal dynamics can help scientists learn more about the universe's evolution.

Key individuals in the discipline

Max Planck, who introduced the Planck constant, and Albert Einstein, the brain behind the theory of relativity, are key figures in understanding and calculating relativistic pressure. Their contributions have paved the way for a deeper understanding of quantum mechanics and astrophysics.

Interesting Facts

  1. The concept of relativistic pressure is crucial for understanding extreme astrophysical objects like neutron stars and black holes.
  2. The reduced Planck constant (also known as Dirac's constant) introduced by Paul Dirac plays a vital role in quantum mechanics.
  3. Despite being less than 20 kilometers in diameter, neutron stars are so dense that a teaspoonful would weigh about a billion tons on Earth.


Understanding the calculation of relativistic pressure underscores the profound interconnections between different areas of physics, such as quantum mechanics and special relativity. It also highlights the applicability of these advanced concepts to real-world scenarios, like understanding the extreme conditions within a neutron star.

Physics Calculators

You may also find the following Physics calculators useful.