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

question 29

Multiple Choice

The focal lengths of the objective and the eyepiece in a microscope are 0.29 cm and 2.50 cm,respectively.An object is placed at 0.30 cm from the objective lens and the image of this object is viewed with the eyepiece adjusted for minimum eyestrain (with the eye focused at the far point) .The near point of the person using the microscope is 25 cm and the far point is at infinity.What is the final overall magnification of the microscope?

• A) -190 x
• B) -240 x
• C) -300 x
• D) -320 x
• E) -470 x

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Definitions:

Positive Correlation

A relationship between two variables in which both variables move in the same direction, indicating that as one variable increases, the other also increases, and vice versa.

Motivation

The process that initiates, guides, and maintains goal-oriented behaviors; it is what causes individuals to act or behave in a certain way to fulfill their needs or desires.

Test Scores

Quantitative measures obtained from educational or psychological tests that reflect the test-taker's performance.

Dependent Variable

In scientific research, the variable that is being tested and measured, which is expected to change under the influence of the independent variable.