- 1(current)
Q. No.A small telescope has an objective of focal length \(140~\text{cm}\) and an eye piece of focal length \(5.0~\text{cm}\) The magnifying power of telescope for viewing a distant object is:
1. \(28\)
2. \(17\)
3. \(32\)
4. \(34\)
1. \(28\)
2. \(17\)
3. \(32\)
4. \(34\)
Subtopic: Â Telescope |
 74%
From NCERT
NEET - 2024
Please attempt this question first.
Hints
Please attempt this question first.
An observer is using an astronomical refracting telescope to observe planets in normal adjustment. The focal lengths of the objective and eyepiece used in the telescope construction are \(20\) m and \(2\) cm respectively. Consider the following statements about the telescope:
The correct statements are:
| (a) | the distance between the objective and the eyepiece is \(20.02\) m. |
| (b) | the magnification of the telescope is \(-1000\). |
| (c) | the image of the planet is erect and diminished. |
| (d) | the aperture of the eyepiece is smaller than that of the objective. |
| 1. | (a), (b), and (c) |
| 2. | (b), (c), and (d) |
| 3. | (c), (d), and (a) |
| 4. | (a), (b), and (d) |
Subtopic: Â Telescope |
 64%
From NCERT
NEET - 2022
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
A lens of large focal length and large aperture is best suited as an objective of an astronomical telescope since:
| 1. | a large aperture contributes to the quality and visibility of the images. |
| 2. | a large area of the objective ensures better light-gathering power. |
| 3. | a large aperture provides a better resolution. |
| 4. | all of the above. |
Subtopic: Â Telescope |
 78%
From NCERT
NEET - 2021
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
Links
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
- 1(current)
Q. No.
© 2024 GoodEd Technologies Pvt. Ltd.