An Eyeglass Lens Is Cut with One Surface Having a Radius

question 34

Multiple Choice

An eyeglass lens is cut with one surface having a radius R₁ and the other surface having a radius R₂,with R₁ < R₂.Both positive radii are measured from the same side with R₁ being the side closer to the eye.Is this convex-concave lens a converging lens or a diverging lens?

• A)This is a converging lens.
• B)This is a diverging lens.
• C)This can be either a converging or diverging lens,as more information is needed for a final determination.
• D)This is neither,since a lens cannot be made this way.