Question : In 1928, which equation was derived and combined quantum theory and special relativity to describe the behaviour of an electron moving at a relativistic speed?
Option 1: Bernoulli's equation
Option 2: Lorentz equation
Option 3: Helmholtz equation
Option 4: Dirac equation
Correct Answer: Dirac equation
Solution : The correct answer is the Dirac equation.
The Dirac equation, developed by physicist Paul Dirac in 1928, is a relativistic wave equation in particle physics. It comprehensively describes spin-1⁄2 massive particles, known as " Dirac particles" including electrons and quarks, maintaining parity symmetry. This equation harmoniously integrates quantum mechanics and special relativity, being the inaugural theory to fully incorporate special relativity into quantum mechanics. Its validation was exemplified by accurately accounting for the fine structure of the hydrogen spectrum.
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