Interactive Laser Beam Expander Calculator How to Use This Calculator This calculator determines the properties of a laser beam after passing through a two-lens beam expander. Enter the Wavelength (λ)

E = mc2 Calculator Mass-Energy Equivalence Converter Solve for Energy (E) Solve for Mass (m) Solve for c Energy (E) Joules (J) Kilojoules (kJ) Kilowatt-hours (kWh) Mega-electron Volts (MeV) Mass

Electron Speed Calculator Classical vs. Relativistic Speeds from Kinetic Energy Introduction This calculator determines the speed of an electron given its kinetic energy (KE). It provides results from two perspectives:

Advanced Interactive Mass Calculator Theory & Formulas: Mass Mass (m) is a fundamental property of matter, representing its resistance to acceleration (inertia) and the strength of its gravitational attraction to