A contact lens is made of plastic with an index of refraction 1.50.The lens has an outer radius of curvature of + 1.65 cm and an inner radius of curvature of + 5.85 cm.What is its focal length?
A)-4.60 cm
B)+1.53 cm
C)+2.57 cm
D)+4.60 cm
E)-2.57 cm

Question

A contact lens is made of plastic with an index of refraction 1.50.The lens has an outer radius of curvature of + 1.65 cm and an inner radius of curvature of + 5.85 cm.What is its focal length?
A)-4.60 cm
B)+1.53 cm
C)+2.57 cm
D)+4.60 cm
E)-2.57 cm ​

Quizplus · Accepted Answer

The Answer of A contact lens is made of plastic with an index of refraction 1.50.The lens has an outer radius of curvature of + 1.65 cm and an inner radius of curvature of + 5.85 cm.What is its focal length?
A)-4.60 cm
B)+1.53 cm
C)+2.57 cm
D)+4.60 cm
E)-2.57 cm ​

A Contact Lens Is Made of Plastic with an Index