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The optical prescription for a pair of spectacles is : Right eye : - 3.50 D Left eye : - 4.00 D (a) Are these lenses thinner at the middle or at the edges ? (b) Which lens has a greater focal length ? (c) Which is the weaker eye ? |
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Answer» The optical prescription for a pair of spectacles is : Right eye : - 3.50 D Left eye : - 4.00 D (a) Are these lenses thinner at the middle or at the edges ? (b) Which lens has a greater focal length ? (c) Which is the weaker eye ? |
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