An astronomical refracting telescope will have large angular magnification and high angular resolution when it has an objective lens of:

1. small focal length and large diameter.
2. large focal length and small diameter.
3. large focal length and large diameter.
4. small focal length and small diameter. 

Subtopic:  Telescope |
 60%
From NCERT
NEET - 2018
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An astronomical telescope has an objective and an eyepiece of focal lengths \(40​​\text{cm}\) and \(4​​\text{cm}\) respectively. To view an object \(200​​\text{cm}\) away from the objective, the lenses must be separated by a distance:
1. \(46.0​​\text{cm}\) 2. \(50.0​​\text{cm}\)
3. \(54.0​​\text{cm}\) 4. \(37.3​​\text{cm}\)
Subtopic:  Telescope |
 63%
From NCERT
NEET - 2016
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