An Astronomical Telescope Has an Objective of Diameter 20 Cm

question 17

Multiple Choice

An astronomical telescope has an objective of diameter 20 cm with a focal length of 180 cm.The telescope is used with an eyepiece of focal length 30 mm.What is the angular magnification of this telescope?

• A) 360 x
• B) 60 x
• C) 540 x
• D) 6 x
• E) 180 x

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Definitions:

Eccentric

A person who deviates from conventional behavior or patterns in an odd or whimsical manner.

Cultural Products

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Avoidant

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Borderline

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