A Converging Lens Is Symmetric; Its Curved Sides Have Radii

question 68

Multiple Choice

A converging lens is symmetric; its curved sides have radii of 50 cm.If the focal length is to be 80 cm, what should the index of refraction be?

• A)0
• B)0.3
• C)0.6
• D)1.3
• E)1.6