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In the figure shown , a point object O i...

In the figure shown , a point object O is placed in air on the principal axis. The radius of curvature of the spherical surfaces is `60 cm.` I is the final image formed after all reflections and refractions.

A

if `d_(1)=120cm`, then the `'l_(f)'` is formed `'O'` for any `v` alue of `d_(2)` .

B

if `d_(1)=240cm`, then the `'l_(f)'` is formed `'O'` only if `d_(2)=360 cm` .

C

if `d_(1)=240cm`, then the `'l_(f)'` is formed `'O'` for all `v` alues of `d_(2)` .

D

if `d_(1)=240cm`, then the `'l_(f)'` cannot be formed in `'O'` .

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RESONANCE ENGLISH-GEOMATRICAL OPTICS -Exercise-2
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