PhysicsEasy105×since 2002Q7054A biconvex lens of refractive index 1.5 has a focal length of 20 cm20 \mathrm{~cm}20 cm in air. Its focal length when immersed in a liquid of refractive index 1.6 will be:A−-−16 cmB+16 cmC+160 cmD−-−160 cmCheck answerSkip