A convex lens has power P . It is cut into two halves along its principal axis . Further one piece (out of the two halves ) is cut into two halves perpendicular to the principal axis (as shown in figures ) .Choose the incorrect option for the reported pieces .

Options

A. Power of `L_(1) =P/2`
B. Power of `L_(2)=P/2`
C. Power of `L_(3) =P/2`
D. Power of `L_(1)=P`

Answer

A

Explanation

`P = 1/f = (mu-1)(2/R)`

`P_(1)=1/f = (mu-1)(2/R)=P`
`L_(2) (##JM_22_S2_20220627_PHY_16_S01.png" width="80%">
`P_(2)=1/f =(mu-1) (1/R)=P/2`
`L_(3)(##JM_22_S2_20220627_PHY_16_S03.png" width="80%">
`P_(3) = 1/f =(mu-1)(1/R)=P/2`