Two identical glass ( miu g = 3/2) equiconvex lenses of focal length f each are kept in contact ....

Описание к видео Two identical glass ( miu g = 3/2) equiconvex lenses of focal length f each are kept in contact ....

Q.25..--- Two identical glass ( miu g = 3/2) equiconvex lenses of focal length f each are kept in contact . The space between the two lenses is filled with water ( miu w = 4/3) . The focal length of the combination is --
(a) f/3
(b) f
(c) 4f/3
(d) 3f/4








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