A standard biological microscope is required to have amagnification of 290×, a.

Question

A standard biological microscope is required to have amagnification of 290×,
a.When paired with a 10× eyepiece, what powerobjective is needed to get this magnification? b.What is the focal length of the objective?(Assume standard length of the microscope 18 cm.) A standard biological microscope is required to have amagnification of 290×,
a.When paired with a 10× eyepiece, what powerobjective is needed to get this magnification? b.What is the focal length of the objective?(Assume standard length of the microscope 18 cm.)

Explanation / Answer

the magnification of a microscope is given by magnificationproduced by objective*magnification produced by eyepiece as per the data magnification due to eyepiece=10 so magnification due to objective=29as total magnification needed =290 magnification due to objective= v/u=L/focal length of objective=18/focal length=29 magnification due to objective= calculating focal length=0.6206cm power=1/focal length im meter=100/0.6206=161.13diopter

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