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Refracting Telescope: an Astronomical Telescope Has an Objective of Diameter

Question 6

Multiple Choice

Refracting telescope: 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

Correct Answer:

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