A convergent lens placed inside a vessel filled with liquid is shown in the fig below . The lens has focal length 20cm when in air and it's material has refractive index 1.5 if the liquid has refractive index 1.6 the focal length of the system is
A convergent lens placed inside a vessel filled with liquid is shown in the fig below . The lens has focal length 20cm when in air and it's material has refractive index 1.5 if the liquid has refractive index 1.6 the focal length of the system is