"Scattering part 1" meter = "meter" kilogram = "kilogram" second = "second" joule = kilogram meter^2 / second^2 E = joule hbar = joule second m = kilogram r = meter c = meter / second "Verify dimensions of exponential" check(sqrt(m E) / hbar r == 1) "ok" "Verify dimensions of cross section" check((hbar c / E)^2 == meter^2) "ok" Run