Calculate the focal length of a biconvex lens in air if the radii of its surfaces are 60 cm and 15 cm. Refractive index of glass = 1.5

Explanation

Using the Lens maker.s Formula,
`(1)/(f)=((mu_(2))/(mu_(1))-1)((1)/(R_(1))-(1)/(R_(2)))`
`(1)/(f)=((1.5)/(1)-1)((1)/(60)-(1)/(-15))=(0.5)[(1)/(60)+(1)/(15)]`
`(1)/(f)=(0.5)[(1+4)/(60)]impliesf=+24cm` .