A man is ordering a lens to use as a reading glass He should order ........

General Science (Easy) Physics

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A man is ordering a lens to use as a reading glass. He should order:

A large convex lens with short focal length

A large convex lens with long focal length

A large concave lens with a short focal length

None of these

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Explanation:

A large convex lens with short focal length

-Reading glasses are generally used by people suffering from long-sightedness or hypermetropia. A convex lens is used for correction. So reading glasses is made up of convex lens. Object is placed a normal distance from eye which is approxiamately 25cm for normal vision.