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:

Financial Risk

The possibility of losing money on an investment or business venture, including market risk, credit risk, liquidity risk, and operational risk.

Variable Cost Ratio

This is a financial metric that represents the variable costs incurred as a percentage of sales, showing how much of each sales dollar is eaten by variable costs.

Degree of Total Leverage

The degree of total leverage measures the sensitivity of a company's net income to a change in sales, combining both operating and financial leverage effects.

Fixed Operating Costs

Expenses that remain constant regardless of the amount of output or sales, including rent, wages, and insurance premiums.