Question

Which of the following correctly represents the Lens Maker's Formula?

विकल्प

• \[\frac{n_1}{OB}+\frac{n_2}{BI_1}=\frac{n_2-n_1}{BC_1}\]

• \[\frac{1}{v}-\frac{1}{u}=\frac{1}{f}\]

• \[\frac{1}{f}=(\mu-1)\left(\frac{1}{R_1}-\frac{1}{R_2}\right)\]

• \[m=\frac{h_i}{h_o}=\frac{v}{u}\]

Answer 1

The Lens Maker's Formula is \[\frac{1}{f}=(\mu-1)\left(\frac{1}{R_1}-\frac{1}{R_2}\right)\], where f is the focal length, \[\mu\] is the refractive index of the lens material with respect to air, and \[R_1\] and \[R_2\] are the radii of curvature of the first and second surfaces respectively.