SATHEE: Optics Question 423

Optics Question 423

Question: A telescope has an objective of focal length 50 cm and an eye piece of focal length 5 cm. The least distance of distinct vision is 25 cm. The telescope is focused for distinct vision on a scale 200 cm away. The separation between the objective and the eye-piece is

[Kerala PET 2002]

Options:

A) 75 $c m$

B) 60 $c m$

C) 71 $c m$

D) 74 $c m$

Show Answer

Answer:

Correct Answer: C

Solution:

$f_{o} = 50 c m,$

$f_{e} = 5 c m,$

$D = 25 c m$ and $u_{o} = 200 c m .$

Separation between the objective and the eye lens is $L = \frac{u_{o} f_{o}}{(u_{o} - f_{o})} + \frac{f_{e} D}{(f_{e} + D)}$

$= \frac{200 \times 50}{(200 - 50)} + \frac{5 \times 25}{(5 + 25)} = 71 c m$

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अगला

Optics Question 423

Question: A telescope has an objective of focal length 50 cm and an eye piece of focal length 5 cm. The least distance of distinct vision is 25 cm. The telescope is focused for distinct vision on a scale 200 cm away. The separation between the objective and the eye-piece is

Options:

Answer:

Solution:

इंजीनियरिंग की तैयारी

चिकित्सा तैयारी

एनसीईआरटी पुस्तकें और समाधान

महत्वपूर्ण संसाधन

अन्य संसाधन

पाठ्यक्रम

परीक्षा मंच

नमूना मॉक टेस्ट

सदस्यता

एनसीईआरटी व्यायाम वीडियो समाधान

Optics Question 423

Question: A telescope has an objective of focal length 50 cm and an eye piece of focal length 5 cm. The least distance of distinct vision is 25 cm. The telescope is focused for distinct vision on a scale 200 cm away. The separation between the objective and the eye-piece is

Options:

Answer:

Solution:

इंजीनियरिंग की तैयारी

चिकित्सा तैयारी

एनसीईआरटी पुस्तकें और समाधान

महत्वपूर्ण संसाधन

अन्य संसाधन

पाठ्यक्रम

परीक्षा मंच

नमूना मॉक टेस्ट

सदस्यता

एनसीईआरटी व्यायाम वीडियो समाधान

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