[latex]Dane:\ eta=25\%=0,25\ P_{wej}=40W\ lambda=660nm=6,6*10^{-7}m\ c=3*10^8frac{m}{s}\ h=6,63*10^{-34}Js\ Oblicz:\ n=?\ Rozwiazanie:[/latex] [latex]eta=frac{P_{wyj}}{P_{wej}}Rightarrow P_{wyj}=eta P_{wej}\\ P_{wyj}=0,25*40=10W\\ W=Pt=10*1=10J\\ E=frac{hc}{lambda}\\ E=frac{6,63*10^{-34}*3*10^8}{6,6*10^{-7}}=3,01*10^{-19}J\\ W=nERightarrow n=frac{W}{E}\\ n=frac{10}{3,01*10^{-19}}\\ n=3,32*10^{19}f[/latex] Pozdrawiam, Adam
Dane: P=40W η=0,25 λ=660nm=6,6 *10(-7)m h=6,63 *10^(-34) J*s c=3*10m/s t=1s [latex]P= frac{W}{t*eta}= frac{n*hv}{t*eta}=frac{n*h frac{c}{lambda} }{t*eta}[/latex] [latex]n= frac{P*t*eta*lambda}{h*c} [/latex] [latex]n= frac{P*t*eta*lambda}{h*c}= frac{40W*1s*0,25*6,6*10^{-7}m}{6,63*10^{-34}J*s*3*10^8 frac{m}{s}}=3,31825*10^{19}[/latex]
