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A person needs a lens of power, −5.5 D for correcting his distant vision. For correcting his near vision, he needs a lens of power, + 1.5 D. What is the focal length of the lens required for correcting:(a) distant vision?(b) near vision?What type of lens is being used for correcting (i) distant vision, and (ii) near vision? |
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Answer» A person needs a lens of power, −5.5 D for correcting his distant vision. For correcting his near vision, he needs a lens of power, + 1.5 D. What is the focal length of the lens required for correcting: (a) distant vision? (b) near vision? What type of lens is being used for correcting (i) distant vision, and (ii) near vision? |
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