Created by StemPy LabThe convex lens in a pair of reading spectacles has a focal length of cm. What power does the optician write on the card, in dioptre?
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← A candle stands 60 cm from a thin convex lens that has a focal length of 30 cm. At what distance from the lens does the sharp image form?Two lenses are made from the same shape of glass blank. The first is made of glass with a higher refractive index. Which statement is correct for lenses in air? →
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