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The equation of refraction at a spherical surface is
μ2 / v – μ1 /u = μ2- μ1 /R
taking R=∞, show that this equation leads to equation
real depth/ apparent depth = μ2/μ1
when R is infinite, u r talking abt a glass slab.So,u were correct
when R=infinity,ur actually talking abt a plane interface like in the case of slabs.
(n2/v)-(n1/u)=0
n2/v=n1/u
u/v=n1/n2
as mentioned earlier that a surface with infinite radius will act as a plane interface,'u' corresponds to real depth(object distance) and 'v' corresponds to apparent depth(image distance).Furthur something by infinity is 0.Now check out ur statement.
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