4. Lex=hυ₀=hc/λ₀=>λ₀=hc/Lex=4,13*10⁻¹⁵*3*10⁸/4,2=2,95*10⁻⁷ m=295 nm
5.
hυ=Lex+mv²/2<=>6,62*10⁻³⁴υ=6,53*10⁻¹⁹+9,1*10⁻³¹*2²*10¹²/2<=>6,62*10⁻³⁴υ=6,53*10⁻¹⁹+36,4*10⁻¹⁹<=>6,62*10⁻³⁴υ=42,93*10⁻¹⁹=>υ=42,93*10⁻¹⁹/6,62*10⁻³⁴=6,49*10¹⁵ Hz
λ=c/υ=3*10⁸/6,49*10¹⁵=0,46*10⁻⁷ m=46 nm
