Question

Doctor has prescribed a lens having power +1.5 D. What will be the focal length of the lens? what is the type of the lens and what must be the defect of vision with Ray diagram​

Answer 1

Answer:

Since, the prescribed lenses have their power positive these are convex lenses. A convex lens has a positive focal length and since power is described as inverse of focal length taken in metres, thus convex lenses have positive focal length.

Answer 2

Answer:

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Explanation:

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