A thin lens made of glass of refractive index has a focal length equal to in air. It is now immersed in water . Its new focal length is:
Focal length in air is given by,
The focal length of lens immersed in water is given by,
where, are radii of curvatures of the two surfaces of lens and is refractive index of glass with respect to liquid.
Study 40% syllabus and score up to 100% marks in JEE