Question

A convex lens made up of a material of refractive index $ {{\mu }_{1}} $ is immersed in a medium of refractive index $ {{\mu }_{2}} $ as shown in the figure. The relation between $ {{\mu }_{1}} $ and $ {{\mu }_{2}} $ is :

• A. $ {{\mu }_{1}}<{{\mu }_{2}} $
• B. $ {{\mu }_{1}}>{{\mu }_{2}} $
• C. $ {{\mu }_{1}}={{\mu }_{2}} $
• D. $ {{\mu }_{1}}=\sqrt{{{\mu }_{2}}} $

Answer 1

Answer: (A)

In a medium of higher refractive index, a convex lens diverges a parallel beam of light, thus behaving a diverging lens. Hence, $ {{\mu }_{1}}<{{\mu }_{2}}. $