A thin convex lens of focal length f made of crown glass is immersed in a liquid of refreactive index `mu_(1) (mu_(1) gt mu_(C ))` where `mu_(c )` is the refractive index of the crown glass.
The convex lens now is

Options

A. a convex lens of longer focal length
B. a convex lens of shorter focal length
C. a divergent lens
D. a convex lens of the focal length `(mu_(c ) - mu_(t))` t

Answer

c

Explanation

When the convex lens of focal length f made of crown glass immersed in liquid of refractive index `mu_(I) (mu_(I) gt mu_(c ))` here `mu_(c )` is the refractive index of crown glass length of the lens as negative `( :' mu_(e ) gt mu_(c ))`. Therefore, the convex lens will behave like a concave lens. So, it will be a divergent lens.