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Question
What is the expression for the power of the glass lens in air (P_glass_air)?
A. P_glass_air = (n_lens - 1)(1/R)
B. P_glass_air = (n_lens - 1)(2/R)
C. P_glass_air = n_lens(2/R)
D. P_glass_air = (1 - n_lens)(2/R)
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