Uses two converging lenses with focal lengths f1 and f2 with f2f1 moreover, Lf2 For lens 1: p1 is chosen such that q1~L (image 1 will appear just…

Uses two converging lenses with focal lengths f1 and f2 with f2>f1 moreover, L>>f2 For lens 1: p1 is chosen such that q1~L (image 1 will appear just within F2) This happens when p1~f1 so: M1=-q1/p1=-L/f1 Lens two then acts as a magnifying glass with m2=NP/f2=25/f2 The magnifying power is defined as m=M1m2=(-L/f1)(25/f2)=-25L/(f1f2) (all units in cm), usually written as: m=-25L/(fOfe) (inverted!) A red blood cell has a size of about 7×10-6 m. A microscope is used to visualize it. The microscope has L=30cm, f0=1 cm, fe=0.5 cm. How large is the cell when seen through the microscope?

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