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A Feynman diagram is a pictorial representation of the mathematical expressions describing the behavior and interaction of subatomic particles. Learn how Feynman diagrams are used in quantum field theory, path integral formulation, renormalization and other areas of physics.
Learn about the set of equations that form the foundation of classical electromagnetism, named after James Clerk Maxwell. The equations describe how electric and magnetic fields are generated by charges, currents, and changes of the fields, and how they propagate as electromagnetic waves.
Planck's law describes the spectral density of electromagnetic radiation emitted by a black body in thermal equilibrium at a given temperature. It shows that the radiation has a maximum intensity at a wavelength that depends on the temperature, and that the energy of the radiation is quantized in units of hν, where h is the Planck constant.
Quantum entanglement is the phenomenon of particles being correlated in such a way that measuring one affects the other, even if they are far apart. Learn about the history, experiments, and applications of entanglement, and how it challenges classical physics.
For Chris Hemsworth, whose career skyrocketed after playing Thor in the Marvel universe, the decision to voice Optimus Prime was an easy one—especially after consulting with his kids.
Zero-point energy is the lowest possible energy that a quantum mechanical system may have, even at absolute zero. It arises from the uncertainty principle and the vacuum fluctuations of matter and force fields, and has implications for cosmology, physics and chemistry.
Learn about the three physical laws that describe the relationship between the motion of an object and the forces acting on it. Newton's first law, also known as the law of inertia, states that a body remains at rest or in motion at a constant speed in a straight line unless acted upon by a force.
A Taylor series is an infinite sum of terms that are expressed in terms of the function's derivatives at a single point. Learn how to find the Taylor series of common functions, such as polynomials, exponential, logarithmic, and trigonometric, and how they relate to analytic functions and Zeno's paradox.