An astronomical refractive telescope has an objective of focal length 20 m and an eyepiece of focal length 2 cm. Which of the following statement is/are correct?
Text Solution
Verified by ExpertsThe correct answer is:
D
The given statement is incorrect and it can be corrected as,
For objective, with large sized lenses the brightness increases and the chromatic aberration also increases.
Given, 
and 
.
In normal adjustment, length of telescope,
Magnification, 
Also, the image formed is inverted with respect to the object.
Rest statements are correct.
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