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A point object O is kept at a distance o...

A point object O is kept at a distance of OP = `u`. The radius of curvature of the spherical surface APB is CP = R. The refractive index of the media are `n_1` and `n_2` which are asshown in the diagram
. Then, (a) if `n_1 >n_2`, image is virtual for all values of `u` (b) if `n_2 = 2n_1`, image is virtual when R > u. (c) the image is real for all values of `u, n_1, n_2`. Here, the correct statements is/are.....................

A

(a),(b) and (c)

B

only (a)

C

both (a) and (b)

D

only (b).

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