A spherical surface of radius of curvature 10 ~cm separates two media and of refractive…
Physics · JEE Main · NTA Exams — Optics
A spherical surface of radius of curvature \(10 \mathrm{~cm}\) separates two media 
and 
of refractive indices \(3 / 2\) and \(4 / 3\)respectively. Centre of the spherical surface lies in denser medium. An object is placed in medium 
. For image to be real, the object distance must be
and of refractive indices \(3 / 2\) and \(4 / 3\)respectively. Centre of the spherical surface lies in denser medium. An object is placed in medium . For image to be real, the object distance must be- greater than \(90 \mathrm{~cm}\)
- less than \(90 \mathrm{~cm}\)
- greater than \(80 \mathrm{~cm}\)
- less than \(80 \mathrm{~cm}\)
Answer
(A) greater than 90 ~cm
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