Round 1/6Score 0
Fringe Finder
Tune interference, diffraction and standing-wave resonance.
Challenge
Live model
Bright fringes occur when path difference equals an integer number of wavelengths.
The physics
Double slit: x = λD/a (small-angle approximation); grating: d sin θ = nλ, d = 1/(1000 N) m for N lines/mm. String: fₙ = nv/(2L), v = √(T/μ). λ in m; a, d in m; μ in kg/m.