Double Slit

Waves, particles and interference

Controls

Slits 2 Wavelength 520 nm Slit spacing 60 Slit width 10 Particles per second 60 👁 Detect which slit each particle goes through

Light passes through the slits and spreads out. Where waves meet in step they add up (bright); out of step they cancel (dark). Fire single particles and the same stripes slowly appear — unless you watch which slit they use. Space pause · C clear · H hide

-- fps