riley-richards_6095dd2ac70c7
riley-richards_6095dd2ac70c7
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R = 30 cm --> f = 15 cm 1/f = 1/p + 1/p' 1/15 = 1/10 + 1/p' 1/p' = 1/15 - 1/10 1/p' = -1/30 p' = -30 cm i/o = -p'/p i/4 = 30/10 i = 12 cm