The Focal Lengths of the Objective and the Eyepiece of a Microscope

question 78

Short Answer

The focal lengths of the objective and the eyepiece of a microscope are 0.5 cm and 2.0 cm, respectively, and their separation adjusted for minimum eyestrain is 6.0 cm. The near-point distance of the person using the microscope is 25.0 cm.
(a) If the microscope is focused on a small object, what is the distance between the object and the objective lens?
(b) If the microscope is focused on a small object, what is its final magnification?

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Definitions:

Sensory Adaptation

The process by which sensory receptors diminish their sensitivity to continuous stimuli, allowing organisms to focus on changes in their environment.

Action Potentials

Rapid, temporary changes in the electrical charge of a cell's membrane, crucial for nerve signal transmission.

Transduction

A process in genetics whereby foreign DNA is introduced into a cell by a virus or viral vector.

Thermoreceptors

Sensory receptors in the skin and other tissues that detect changes in temperature, important for maintaining thermoregulation.