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ν = E / h
h = 6,63 *10⁻³⁴ J * s
a)
ν = 2 *10⁻¹⁶ J / 6,63 *10⁻³⁴ J*s
ν ≈ 0,3*10¹⁸ Hz
ν = c /λ
λ = c / ν
λ = 3 * 10⁸ m/s / 0,3 *10¹⁸ /s
λ = 10 *10⁻¹° m = 100 *10⁻⁹ m = 100 nm
b)
ν = 6*10⁻¹⁹ J / 6,63 *10⁻³⁴ J/s = 0,9 *10¹⁵ Hz
λ = 3 *10⁸ m/s / 0,9 *10¹⁵ /s
λ = 3,33 *10⁻⁷ m = 0,03 *10⁻⁹ m = 0,03 nm
zakres długości światła widzialnego :
380 nm = 380 *10⁻⁹ m do 780 nm = 780 *10⁻⁹ m
ogólny wzór :
E = h * c / lambda