A very fine sample is placed 0.15 cm from the objective of a microscope. The focal length of the objective is 0.14 cm and of the eyepiece is 1.0 cm. The near-point distance of the person using the microscope is 25.0 cm. What is the final magnification of the microscope?
A) -375
B) -242
C) -108
D) -142
E) -100

Question

Quizplus · Accepted Answer

The magnification of a microscope is given by the formula: M = (L/f_o) * (N/f_e), where L is the tube length (assumed to be 25 cm for standard microscopes), f_o is the focal length of the objective, N is the near-point distance, and f_e is the focal length of the eyepiece. Substituting the given values: M = (25/0.14) * (25/1.0) = -375.

A Very Fine Sample Is Placed 0