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Q. A typical red blood cell subtends an angle of only 1.91E-5 rad while viewed at a person's near-point distance of 25cm. Assume a red blood cell is examined with a compound microscope in which the objective and eyepiece are separated by a distance of 11cm. Given that the focal length of the eyepiece is 2.51cm, and focal length of the objective is 0.509 cm, calculate the magnitude of the angle subtended by the red blood cell when viewed through this microscope.

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