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A hollow convex lens of glass will beha...

A hollow convex lens of glass will behave like a

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Hollow convex lens is as shown in figure
`1/(f_1 )= (mu_e-1) (1/R_1-1/R_2) =0`
or `f_1= infty`, Similarity `f_2= infty `
Therefore, a hollow equi convex lens of any material will behave like a glass plate.
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