MHT CET · Physics · Ray Optics
Focal length of objective of an astronomical telescope is 1.5 m . Under normal adjustment, length of telescope is 1.56 m . Focal length of the eyepiece is
- A 0.06 m
- B 1.04 m
- C 2.34 m
- D 3.06 m
Answer & Solution
Correct Answer
(A) 0.06 m
Step-by-step Solution
Detailed explanation
For an astronomical telescope,
\(\begin{aligned}
& L=f_0+f_e \\
& 1.56=1.5+f_e \\
\therefore \quad & f_e=0.06 m
\end{aligned}\)
\(\begin{aligned}
& L=f_0+f_e \\
& 1.56=1.5+f_e \\
\therefore \quad & f_e=0.06 m
\end{aligned}\)
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