Laws Of Physics

By nature, laws of physics are stated facts which have been deduced and derived based on empirical observations. Simply put, the world around us works in a certain way, and physical laws are a way of classifying that “working.”

Physical laws are just conclusions drawn based on years (or however long it takes) of scientific observations and experiments which are repeated over and over under different conditions to reach inferences which can be accepted worldwide. These are continuously validated by the scientific community over time.

Important Laws of Physics:

Laws Of Physics
Lamberts Cosine Law Kelvin Planck Statement
Dalemberts Principle Clausius Statement
Law Of Conservation Of Mass Fouriers Law
Hubbles Law Bells Theorem
Boltzmann Equation Lagrangian Point
Beer Lambert Law Maxwell Relations
Van Der Waals Equation Carnots Theorem
Fermi Paradox Helmholtz Equation
Helmholtz Free Energy Ficks Law Of Diffusion
Raman Scattering Wiens Law
Dirac Equation Mach Number
Coulomb’s Law Avogadro’s Hypothesis
Law of Conservation of Energy Archimedes’ Principle
Biot-Savart Law Faraday’s Law
Ampere’s Law Faraday’s Laws of Electrolysis
Planck Equation Kirchhoff’s law
Kirchoff’s Second Law Newton’s law of universal gravitation
Maxwell’s Equations Bernoulli’s Principle
Electric Potential due to a Point charge Zeroth Law of Thermodynamics
Gauss’ Law First law of thermodynamics
Lenz’s Law Wein’s Displacement Law
Ohm’s Law Law of Equipartition of Energy
Joule’s Laws Laws of reflection
Brewster’s law Radioactive Decay Law
Bragg’s Law Murphy’s Law
Doppler Effect Einstein Field Equation
Casimir Effect Stefan-Boltzmann Law
Moseley’s Law Superposition Principle
Newton’s Laws of Motion Thermodynamics
Laws of Friction Heisenberg Uncertainty Principle
Pascal’s Law Wave-Particle Duality
Snell’s law Fermat’s Principle
Boyle’s Law Huygens’ Principle
Pascal’s Law Ideal Gas Law
Equivalence Principle Joule-Thomson Effect
Curie-Weiss Law Law of Conservation of Linear Momentum
Curie’s Law Wiedemann-Franz Law
Newton’s Second law of motion Newton’s First law of motion
Newton’s Third law of motion Continuity Equation
Chandrasekhar Limit

Application of Laws Of Physics

In the beginning, it was assumed that the earth was the centre of the universe. Then it was hypothesized that our sun is the centre of the universe. We now know that both these conclusions are wrong. The sun may be the centre of our solar system, but it is not the centre of the universe.

Another example is the odd behaviour of the planet Mercury. Newton’s universal law of gravitation was able to explain all the other planets in the solar system but the orbit and rotational period of Mercury was a bit off, and for some time no one knew why. Einstein came to the rescue with his general theory of relativity later on.

The different properties of laws of physics which shed information about their nature is given below:

  • True, under specified conditions
  • Universal and do not deviate anywhere in the universe
  • Simple in terms of representation
  • Absolute and unaffected by external factors
  • Stable and appear to be unchanging
  • Omnipresent and everything in the universe is compliant (in terms of observations)
  • Conservative in terms of quantity
  • Homogeneous in terms of space and time
  • Theoretically reversible in time

Basic laws of physics that govern our universe can be categorized in two ways. Classical physics that deals with us, the surrounding environment and the observable universe around us. Apart from this, there is also atomic physics that deals with subatomic particles and their interactions (quantum mechanics).

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Practise This Question

A uniform chain of length l is placed on the table in such a manner that its l' part is hanging over the edge of table without the chain sliding. If the coefficient of friction between the chain and the table is μ  then find the maximum length of chain l' that can hang without the entire chain slipping.