A Telescope Is Set Up in an Introductory Physics Lab

question 53

Multiple Choice

A telescope is set up in an introductory physics lab using lenses of focal lengths 10 cm and 50 cm. Since both lenses are the same diameter, it is not immediately clear which one to use as the eyepiece and which to use as the objective. If one uses the lens with a 50 cm focal length as the eyepiece, what power results?

• A) 500
• B) 5
• C) 0.2
• D) 0.002
• E) one cannot look through the system in this direction

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Definitions:

EBIT

A financial indicator, Earnings Before Interest and Taxes, reflects a company's earnings by removing the effects of interest and tax expenses.

Fixed Costs

Costs that do not change with the level of output or sales in the short term.

EPS

Earnings Per Share, a measure of a company's profitability, calculated as net income divided by the number of outstanding shares.

DFL

Degree of Financial Leverage, a ratio that measures the sensitivity of a company's earnings per share to fluctuations in its operating income due to changes in its capital structure.