Best Einstein
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General relativity describes gravity not as a force, but as the curvature of spacetime caused by mass and energy, influencing how objects move within it.
Mass-energy equivalence, expressed by Einstein's famous equation E=mc², states that mass and energy are fundamentally interchangeable; a small amount of mass can be converted into a tremendous amount of energy, and vice versa.
Special relativity, proposed by Einstein, describes how space and time are intertwined for observers in uniform motion, fundamentally altering concepts of simultaneity and length at high velocities approaching the speed of light.
The photoelectric effect is the emission of electrons from a material when light shines on it, with the ejected electrons' energy dependent on light frequency, not intensity.
The equivalence principle states that gravitational and inertial mass are fundamentally indistinguishable; an observer in freefall experiences the same effects as those in a uniformly accelerating reference frame.
The cosmological constant represents a theoretical energy density permeating space, contributing to the accelerating expansion of the universe and initially proposed by Einstein to maintain a static cosmos.
