Quick guide
How to use this calculator
- Choose the complete example closest to the physical situation.
- Replace every preset with compatible values while retaining direction signs and stated units.
- Check the detailed labels, equation and model boundary before relying on the result.
Calculation method
Transparent physics calculation
Kmax = hf − φ
Only the displayed quantities are used; no hidden material, environmental or safety factor is introduced.
Worked example
Three complete starting scenarios
Load a complete ultraviolet light example.
Kmax = hf − φ
Supported inputs
Precision and limits
Idealized model
This is an idealized physical model, not a safety, equipment-selection, clinical, radiation-protection or professional design decision.
Units and frames
Keep all inputs in the displayed units and use one consistent sign convention and reference frame.
Experimental uncertainty
Measured inputs carry uncertainty that may materially affect the result even when the arithmetic is exact.
Privacy
Entered physical quantities remain in this browser.