Question

va rog mult sa ma ajutati. Dau coroana

Answer 1

[tex] \displaystyle Se~da:\\ \\ C=20dioptrii\\ \\ h=5mm=0,005m\\ \\ f=6cm=0,06m\\ \\ h_0=?m\\ \\ d=?m\\ \\ \\[/tex]


[tex]\displaystyle Formule:\\ \\ \frac fd=\frac h{h_0}\\ \\ h_0=\frac{h\times d}f\\ \\ \\ Lentila~este~convergenta~si~imaginea~este~reala,~deci:\\ \\ C=\frac 1d+\frac 1f\\ \\ \frac 1d=C-\frac 1f\\ \\ \frac 1d=\frac{C\times f-1}{f}\\ \\ d=\frac{f}{C\times f-1}\\ \\ \\[/tex]


[tex]\displaystyle Calcule:\\ \\ d=\frac{0,06}{20\times 0,06-1}=0,3m\\ \\ h_0=\frac{0,005\times 0,3}{0,06}=0,025m[/tex]