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Types of Lenses

A CONVEX LENS...

Question

A CONVEX LENS OF GLASS OF REFREACTIVE INDEX N1 , IS IMMERGED IN A MEDIUM OF REFRACTIVE INDEX N2 .HOW WILL THE LENS BEHAVE WHEN N1

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Solution

$A s w e k n o w b y l e n s m a k e r f o r m u l a t h a t : 1 / f = (μ_{l e n s} / μ_{s u r r o u n d i n g} - 1) (1 / R_{1} - 1 / R_{2}) S o i s d e p e n d s u p o n t h e t e r m μ_{l e n s} / μ_{s u r r o u n d i n g} - 1 w e k n o w t h a t f o r c o n v e x l e n s : (1 / R_{1} - 1 / R_{2}) > 0 a n d i f μ_{l e n s} > μ_{s u r r o u n d i n g} i t i s c o n v e x . a n d i f μ_{l e n s} < μ_{s u r r o u n d i n g} i t i s c o n c a v e .$

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