" A thin iens of focal length "+12cm" is immersed in water "(g=1.3)" .What is its near focal longth? "

A thin lens of focal length + 12 cm is immersed in water (mu = 1.33). What is its new focal length ?

A thin lens of focal length + 12 cm is immersed in water (mu = 1.33). What is its new focal length ?

A thin lens of focal length + 12 cm is immersed in water (mu = 1.33). What is its new focal length ?

A convex lens of focal length 24 cm is totally immersed in water (n = 1.33). Find its focal length in water (n = 1.5).

A thin lens made of glass of refractive index muu = 1.5 has a focal length equal to 12 cm in air. It is now immersed in water ( mu=4/3 ). Its new focal length is