Question

A convex lens has a focal length of $10cm$. When it is immersed in water it will behave as

• A. A convex lens of $10cm$ focal length
• B. A concave lens of $10cm$ focal length
• C. A convex lens of focal length greater than $10cm$
• D. A convex lens of focal length less than $10cm$

Answer 1

The correct option is C A convex lens of focal length greater than $10cm$