Statement-1 : Focal length of an equiconvex lens of `mu = 3//2` is equal to radius of curvature of each surface.
Statement-2 : it follows from
`(1)/(f) = (mu - 1)((1)/(R_(1)) - (1)/(R_(2)))`

Options

A. Statement-1 is true, Statement-2 is true.
Statement-2 is correct explanation of Statement-1.
B. Statement-1 is true, Statement-2 is true, but Statement-2 is not a correct explanation of Statement-1.
C. Statement-1 is true, Statement-2 is false.
D. Statement-1 is fasle, Statement-2 is true.

Answer

A

Explanation

For an equiconvex lens, if `R_(1) = R, R_(2) = - R`
`:. (1)/(f) = ((3)/(2) - 1)((1)/(R ) + (1)/(R )) = (1)/(R )`
`f = R`
Hence both the statement are true and statement-2 is correct explanation of statement-1.