przelicz :  c = 3 * 10 ^ -8 m/s f1=? f2=? lambda1=400n.m lambda2=800 n.m c=lambda*f lambda=v*T T=1/f lambda=v/f -> c=lambda * f

c = 3 x 10⁸m/s λ₁ = 400nm = 400 x 10⁻⁹m λ₂ = 800nm = 800 x 10⁻⁹m   f = ? T = ?   f = c/λ T = 1/f = λ/c   f₁ = 3 x 10⁸m/s / 400 x 10⁻⁹m = 0,0075 x 10¹⁷Hz = 75 x 10¹³Hz f₂ = 3 x 10⁸m/s / 800 x 10⁻⁹m = 0,00375 x 10¹⁷Hz = 37,5 x 10¹³Hz   T₁ = 400 x 10⁻⁹m / 3 x 10⁸m/s = 133⅓ x 10⁻¹⁷s T₂ = 800 x 10⁻⁹m / 3 x 10⁶m/s = 266⅔ x 10⁻¹⁷s   ---------------------------------------------------------------------------------------------------------- Feci, quod potui, faciant meliora potentes   Pozdrawiam :)