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What is the total focus length ftot of device

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The optical device consists of two lenses with focal points f1 = 1 m and f2 = 1.5 m which are L = 20 cm apart. We place an object 5 m on the left from the device. What is the position of the image? What is the total focus length ftot of this device?

Reference no: EM131862568

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