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sci.photoelectric-effect Calculator
Calculates the maximum kinetic energy of photoelectrons from photon energy and work function: KE = hf − φ. Einstein's photoelectric equation: for aluminium (φ = 4.1 eV), photons below λ = 302 nm cannot eject electrons.
Inputs
Photon Frequency Hz
Cycles per second (Hz). Audible sound: 20 Hz – 20 kHz. Make sure units match what the formula expects.
Work Function Ev
Energy transferred by a force over a displacement (J = N·m).
Electron Mass Kg
Total mass (kg). Distinct from weight — weight = mass × gravity. Mass is constant; weight varies with location.
Results
max kinetic energy (eV)
Energy of motion: KE = ½mv². Scales with the SQUARE of velocity — doubling speed quadruples kinetic energy. This is why crash severity grows so rapidly with speed.
max electron velocity (m/s)
Sample size or count used in the calculation.
photon energy (eV)
pH of the solution. Below 7: acidic. 7: neutral. Above 7: basic (alkaline).
work function Φ
The type of mathematical function or operational classification determined by the calculation.
KE = hf - Φ
Reference formula or conversion factor shown for context.