The images of astronomical and terrestrial telescopes

Reference no: EM13654207

1. The images of astronomical and terrestrial telescopes are colored around the edges. Explain that. How can this "chromaticaberration" be avoided in practice?

2. An optical lab stocks a large collection of lenses with bothpositive and negative focal lengths. A lens with a positive focallength larger than the largest available positive f lens isurgently needed. Suggest how this can be achieved using acombination of available lenses.

Reference no: EM13654207

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