NEET · Physics · STD 12 - 9. Ray optics and optical instruments
A astronomical telescope has objective and eyepiece of focal lengths \(40\,\, cm\) and \(4\,\, cm\) respectively. To view an object \(200\,\, cm\) away from the objective, the lenses must be separated by a distance.....\(cm\)
- A \(46\)
- B \(50\)
- C \(54\)
- D \(37.3 \)
Answer & Solution
Correct Answer
(C) \(54\)
Step-by-step Solution
Detailed explanation
Here \(f_{o}=40\, \mathrm{cm}\), \(f_{e}=4 \,\mathrm{cm}\) Tube length( \((l)=\) Distance between lenses \(=v_{o}+f_{e}\) For objective lens,
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