physics

• Interactive Ohm's Law Calculator

  Set any two of voltage, current, and resistance and watch the third solve itself with V = I × R. A live circuit lights a bulb whose brightness tracks the power.

• Interactive Wave Explorer

  Animate a travelling wave, adjust its amplitude, wavelength, and frequency, switch between transverse and longitudinal motion, and watch wave speed (v = f × λ) and period (T = 1/f) update live.

• The Electromagnetic Spectrum

  Slide along the electromagnetic spectrum from radio waves to gamma rays and watch wavelength, frequency, and photon energy update together — with a rainbow swatch in the visible band.