A Double-Convex Lens Made of Glass Having a Refractive Index

question 54

Multiple Choice

A double-convex lens made of glass having a refractive index of 1.50 has a radius of magnitude 40 cm on the front side and one of magnitude 30 cm on the back side. What is the focal length of this
Lens?

• A) 11 cm
• B) 80 cm
• C) 34 cm
• D) -11 cm
• E) -240 cm