A concave lens of glass, refractive index 1.5, has both surfaces of same radius of curvature R. On immersion in a medium of refractive index 1.75, it will behave as a,

A concave lens of glass, refractive index 1.5, has both surfaces of sa

1.	A concave lens of glass, refractive index 1.5, has both surfaces of same radius of curvature R. On immersion in a medium of refractive index 1.75, it will behave as a,
Answer» CONVERGENT LENS of FOCAL length 3.5 R convergent lens of length 3.0 R divergent lens of focal length 3.5 R divergent lens of focal length 3.0 R Solution :(a) `(1)/(F), = ((1.5)/(1.675)-1)(-(2)/( R))` f. = 3.5 R.

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A concave lens of glass, refractive index 1.5, has both surfaces of same radius of curvature R. On immersion in a medium of refractive index 1.75, it will behave as a,

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