A double concave lens has surface radi of 31.4 cm and 28.3 cm. T Part A What is the focal length it n 1.56? Follow the sign conventions Express your answer to two significant figures and include the appropriate units. A 1- Value Submit Provide Feedback Bequest Answer Units
A double concave lens has surface radi of 31.4 cm and 28.3 cm. T Part A What is the focal length it n 1.56? Follow the sign conventions Express your answer to two significant figures and include the appropriate units. A 1- Value Submit Provide Feedback Bequest Answer Units
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