A convex lens is fabricated from a material possessing a refractive index of 1.2 . Both of its surfaces are convex. If immersed in water ( = 1.33 ), it will function as

Step-by-step solution

According to the lens maker's formula: 1 f = ( _L _M - 1 ) ( 1 R₁ - 1 R₂ ) For a biconvex lens, R₁ is positive and R₂ is negative, so ( 1 R₁ - 1 R₂ ) > 0 . Given _L = 1.2 and _M = 1.33 . Since _L Therefore, the focal length f becomes negative. A lens with a negative focal length behaves as a divergent lens.