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As the refractive index of glass varies with wavelength, each and every property of the lens that is dependent upon its refractive index also differs with wavelength, such as the focal length, the impression distance, plus the graphic magnification. The transform of image distance with wavelength is called chromatic aberration, https://cheapprescriptionglasses44433.iyublog.com/29403256/glasses-store-near-me-for-dummies

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