Given \( { }^{a} \mu_{g}=3 / 2 \) and \( { }^{a} \mu_{w}=4 / 3 \). There is an equiconvex l....

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Question Given \( { }^{a} \mu_{g}=3 / 2 \) and \( { }^{a} \mu_{w}=4 / 3 \). There is an equiconvex lens with radius of each surface equal to \( 20 \mathrm{~cm} \). there is air in the object space and water in the image space. The focal length of lens is
(A)  \( 80 \mathrm{~cm} \)
(B) \( 40 \mathrm{~cm} \)
(C) \( 20 \mathrm{~cm} \)
(D) \( 10 \mathrm{~cm} \)📲PW App Link - https://bit.ly/YTAI_PWAP 🌐PW Website - https://www.pw.live



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