A microscope has an objective lens of focal length 1.40 mm and an eyepiece of focal length 20.00 mm. It is adjusted for minimum eyestrain for persons with a near point of 25.0 cm. A blood
Sample is placed 1.50 mm from the objective. The magnitude of the overall magnification is closest
To
A) 180.
B) 18.
C) 37.
D) 370.

Question

Quizplus · Accepted Answer

The magnification of a microscope is given by the product of the magnifications of the objective and the eyepiece. The objective magnification is calculated using the formula M_obj = -L/f_obj, where L is the tube length (assumed to be 25 cm for minimum eyestrain) and f_obj is the focal length of the objective. The eyepiece magnification is M_eye = 25 cm/f_eye. Substituting the given values, the overall magnification is approximately 180.

A Microscope Has an Objective Lens of Focal Length 1