Question
A convex lens made of glass has a focal length of 0.15 m in air. If the refractive index of glass is $ \frac{3}{2} $ and that of water is $ \frac{4}{3} $, the focal length of the lens when immersed in water is:
A convex lens made of glass has a focal length of 0.15 m in air. If the refractive index of glass is $ \frac{3}{2} $ and that of water is $ \frac{4}{3} $, the focal length of the lens when immersed in water is: