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Question Number 9544 by tawakalitu last updated on 14/Dec/16

Answered by ridwan balatif last updated on 15/Dec/16

r_1 =+22.4cm and r_2 =+46.2 cm  (1/f)=(n−1)((1/r_1 )−(1/r_2 ))  (1/f)=(1.5−1)((1/(22.4))−(1/(46.2)))  f=86.96 cm

$$\mathrm{r}_{\mathrm{1}} =+\mathrm{22}.\mathrm{4cm}\:\mathrm{and}\:\mathrm{r}_{\mathrm{2}} =+\mathrm{46}.\mathrm{2}\:\mathrm{cm} \\ $$$$\frac{\mathrm{1}}{\mathrm{f}}=\left(\mathrm{n}−\mathrm{1}\right)\left(\frac{\mathrm{1}}{\mathrm{r}_{\mathrm{1}} }−\frac{\mathrm{1}}{\mathrm{r}_{\mathrm{2}} }\right) \\ $$$$\frac{\mathrm{1}}{\mathrm{f}}=\left(\mathrm{1}.\mathrm{5}−\mathrm{1}\right)\left(\frac{\mathrm{1}}{\mathrm{22}.\mathrm{4}}−\frac{\mathrm{1}}{\mathrm{46}.\mathrm{2}}\right) \\ $$$$\mathrm{f}=\mathrm{86}.\mathrm{96}\:\mathrm{cm} \\ $$

Commented by tawakalitu last updated on 15/Dec/16

Thank you sir. God bless you.

$$\mathrm{Thank}\:\mathrm{you}\:\mathrm{sir}.\:\mathrm{God}\:\mathrm{bless}\:\mathrm{you}. \\ $$

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