A thin lens of refractive index `1.5` has focal length of `15 cm` in air. When the lens is placed is a medium of refractive index (4)/(3), its focal length will become …..cm.A. 15 cmB. 10 cmC. 30 cmD. 60 cm

A thin lens of refractive index `1.5` has focal length of `15 cm` in a

1.	A thin lens of refractive index `1.5` has focal length of `15 cm` in air. When the lens is placed is a medium of refractive index (4)/(3), its focal length will become …..cm.A. 15 cmB. 10 cmC. 30 cmD. 60 cm
Answer» Correct Answer - d

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A thin lens of refractive index `1.5` has focal length of `15 cm` in air. When the lens is placed is a medium of refractive index (4)/(3), its focal length will become …..cm.A. 15 cmB. 10 cmC. 30 cmD. 60 cm

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