The Objective of an Astronomical Telescope Has a Focal Length $\times$

question 57

Multiple Choice

The objective of an astronomical telescope has a focal length of 900 mm.The telescope has eyepieces of focal lengths 20 mm,15 mm,and 10 mm.What is the highest magnification for this telescope?

• A) 920\(\times\)
• B) 900\(\times\)
• C) 880\(\times\)
• D) 90\(\times\)
• E) 60\(\times\)

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Definitions:

Mean

The average of a set of numbers, calculated by adding them together and dividing by the number of values.

Standard Deviation

A measure of the amount of variation or dispersion of a set of values from the mean.

ACT Type Score

A numerical measurement that represents a student's achievement on the ACT test, which is commonly used for college admissions in the United States.

Normal Curve

A bell-shaped curve that represents the distribution of many types of data where most occurrences take place around the average, and fewer instances occur as you move away from the center.