Waves & Optics
The Doppler Effect
Why a passing siren drops in pitch and distant galaxies glow redder — both reveal the same simple truth about…
Waves & Optics
Waves & Optics
The Electromagnetic Spectrum
Radio waves, visible light, and gamma rays are all the same thing — only the wavelength changes across this vast,…
Waves & Optics
Longitudinal Waves Explained
Sound reaches your ears not by air rushing toward you, but by a pattern of squeezes and stretches rippling through…
Waves & Optics
Reflection and Refraction
Why mirrors bounce light and lenses bend it comes down to two simple rules about angles, and a single number…
Waves & Optics
Young’s Double-Slit Experiment
By shining light through two narrow slits and watching bright and dark bands appear, Thomas Young proved light is a…
Waves & Optics
Wave Speed, Frequency and Wavelength
Three quantities describe every wave in the universe, and one tidy equation ties them together — master it and you…
Waves & Optics
Transverse Waves Explained
In a transverse wave the medium shakes sideways while the wave races forward, a simple sideways dance that explains light,…