Recheck you numbers. Telescopes have long focal lengths and their eyepieces (if used) have short focal lengths.
The telescope length, if you are using a refractor, is the sum of the objective and eyepiece focal lengths.
Assuming you got the numbers mixed up, the answer is 1.8 m
The focal length of objective of a telescope is 0.2 m and the eyepiece has a focal length of 1.6 m. What is the length of this telescope?
A) 8.0 m B) 1.4 m C) 1.6 m D) 1.8 m
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