Question

The diagram shows an equiconvex lens. What should be the condition on the refractive indices so that the lens become diverging –

• A. (a) 2m2 > m1 – m3
• A. (b) 2m2 < m1 + m3
• C. 2m2 > 2m1 – m3
• D. 2m2 > m1 + m3

Answer 1

$\frac { \mu _ { 3 } } { \mathrm { v } } - \frac { \mu _ { 1 } } { - \infty }$ = + $\frac { \mu _ { 3 } - \mu _ { 2 } } { - R }$

v should be – ve

Ž

Ž 2m₂ < m₁ + m₃