A Microscope Has an Objective Lens of Focal Length 1

question 22

Multiple Choice

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.How far apart are the lenses?

• A)20 mm
• B)21 mm
• C)23 mm
• D)41 mm

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Definitions:

American Psychological Association

The American Psychological Association is a professional organization representing psychologists in the United States, dedicated to advancing psychology as a science, profession, and means of promoting health and human welfare.

Learned Helplessness

The situation in which someone feels powerless, due to experiencing a traumatic incident or repeated failures to accomplish goals.

Implications

Possible results or effects of an action or decision, often indirect or not immediately obvious.

Internal Locus

The belief that one has control over their own life and outcomes, as opposed to external forces having that control.