NEET Exam > NEET Questions > An astronomical refractive telescope has an o...
Start Learning for Free
An astronomical refractive telescope has an objective of focal length 20m and an eyepiece of focal length 2cm.
- a)the magnification is 1000
- b)the length of the telescope tube is 20.02 m
- c)the image formed is inverted
- d)all of these
Correct answer is option 'D'. Can you explain this answer?
| FREE This question is part of | Download PDF Attempt this Test |
Verified Answer
An astronomical refractive telescope has an objective of focal length ...
Here, f0 = 20 m and fe = 2 cm = 0.02m
In normal adjustment,
Length of telescope tube, L = f0 + fe = 20 + 0.02 = 20.02m
and magnification, m = f
The image formed is inverted with respect to the object.
In normal adjustment,
Length of telescope tube, L = f0 + fe = 20 + 0.02 = 20.02m
and magnification, m = f
0
/ fe = 20/0.02 = 1000The image formed is inverted with respect to the object.
Most Upvoted Answer
An astronomical refractive telescope has an objective of focal length ...
Explanation:
An astronomical refractive telescope consists of an objective lens and an eyepiece. The objective lens collects the light from distant objects and forms an image, which is then magnified by the eyepiece for viewing. Let's analyze each given statement to understand why the correct answer is option 'D'.
a) The magnification is 1000:
The magnification of a telescope can be calculated using the formula:
Magnification = (-) (Focal length of the objective lens) / (Focal length of the eyepiece)
Given that the focal length of the objective lens is 20m and the focal length of the eyepiece is 2cm (0.02m), we can calculate the magnification as follows:
Magnification = (-) (20m) / (0.02m) = (-) 1000
The negative sign indicates that the image formed is inverted.
b) The length of the telescope tube is 20.02m:
The length of the telescope tube is equal to the sum of the focal lengths of the objective lens and the eyepiece. Given that the focal length of the objective lens is 20m and the focal length of the eyepiece is 2cm (0.02m), we can calculate the total length as follows:
Length of the telescope tube = (Focal length of the objective lens) + (Focal length of the eyepiece)
= 20m + 0.02m
= 20.02m
Therefore, the length of the telescope tube is indeed 20.02m.
c) The image formed is inverted:
In a refractive telescope, the objective lens forms an inverted image of the distant object. This inverted image is then magnified by the eyepiece for viewing. Therefore, the statement is true.
d) All of these:
By analyzing the explanations above, we can conclude that all the given statements are true. Therefore, the correct answer is option 'D'.
An astronomical refractive telescope consists of an objective lens and an eyepiece. The objective lens collects the light from distant objects and forms an image, which is then magnified by the eyepiece for viewing. Let's analyze each given statement to understand why the correct answer is option 'D'.
a) The magnification is 1000:
The magnification of a telescope can be calculated using the formula:
Magnification = (-) (Focal length of the objective lens) / (Focal length of the eyepiece)
Given that the focal length of the objective lens is 20m and the focal length of the eyepiece is 2cm (0.02m), we can calculate the magnification as follows:
Magnification = (-) (20m) / (0.02m) = (-) 1000
The negative sign indicates that the image formed is inverted.
b) The length of the telescope tube is 20.02m:
The length of the telescope tube is equal to the sum of the focal lengths of the objective lens and the eyepiece. Given that the focal length of the objective lens is 20m and the focal length of the eyepiece is 2cm (0.02m), we can calculate the total length as follows:
Length of the telescope tube = (Focal length of the objective lens) + (Focal length of the eyepiece)
= 20m + 0.02m
= 20.02m
Therefore, the length of the telescope tube is indeed 20.02m.
c) The image formed is inverted:
In a refractive telescope, the objective lens forms an inverted image of the distant object. This inverted image is then magnified by the eyepiece for viewing. Therefore, the statement is true.
d) All of these:
By analyzing the explanations above, we can conclude that all the given statements are true. Therefore, the correct answer is option 'D'.
Attention NEET Students!
To make sure you are not studying endlessly, EduRev has designed NEET study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in NEET.
|
Explore Courses for NEET exam
|
|
Similar NEET Doubts
Top Courses for NEETView all
An astronomical refractive telescope has an objective of focal length 20m and an eyepiece of focal length 2cm.a)the magnification is 1000b)the length of the telescope tube is 20.02 mc)the image formed is invertedd)all of theseCorrect answer is option 'D'. Can you explain this answer?
Question Description
An astronomical refractive telescope has an objective of focal length 20m and an eyepiece of focal length 2cm.a)the magnification is 1000b)the length of the telescope tube is 20.02 mc)the image formed is invertedd)all of theseCorrect answer is option 'D'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about An astronomical refractive telescope has an objective of focal length 20m and an eyepiece of focal length 2cm.a)the magnification is 1000b)the length of the telescope tube is 20.02 mc)the image formed is invertedd)all of theseCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for An astronomical refractive telescope has an objective of focal length 20m and an eyepiece of focal length 2cm.a)the magnification is 1000b)the length of the telescope tube is 20.02 mc)the image formed is invertedd)all of theseCorrect answer is option 'D'. Can you explain this answer?.
An astronomical refractive telescope has an objective of focal length 20m and an eyepiece of focal length 2cm.a)the magnification is 1000b)the length of the telescope tube is 20.02 mc)the image formed is invertedd)all of theseCorrect answer is option 'D'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about An astronomical refractive telescope has an objective of focal length 20m and an eyepiece of focal length 2cm.a)the magnification is 1000b)the length of the telescope tube is 20.02 mc)the image formed is invertedd)all of theseCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for An astronomical refractive telescope has an objective of focal length 20m and an eyepiece of focal length 2cm.a)the magnification is 1000b)the length of the telescope tube is 20.02 mc)the image formed is invertedd)all of theseCorrect answer is option 'D'. Can you explain this answer?.
Solutions for An astronomical refractive telescope has an objective of focal length 20m and an eyepiece of focal length 2cm.a)the magnification is 1000b)the length of the telescope tube is 20.02 mc)the image formed is invertedd)all of theseCorrect answer is option 'D'. Can you explain this answer? in English & in Hindi are available as part of our courses for NEET.
Download more important topics, notes, lectures and mock test series for NEET Exam by signing up for free.
Here you can find the meaning of An astronomical refractive telescope has an objective of focal length 20m and an eyepiece of focal length 2cm.a)the magnification is 1000b)the length of the telescope tube is 20.02 mc)the image formed is invertedd)all of theseCorrect answer is option 'D'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
An astronomical refractive telescope has an objective of focal length 20m and an eyepiece of focal length 2cm.a)the magnification is 1000b)the length of the telescope tube is 20.02 mc)the image formed is invertedd)all of theseCorrect answer is option 'D'. Can you explain this answer?, a detailed solution for An astronomical refractive telescope has an objective of focal length 20m and an eyepiece of focal length 2cm.a)the magnification is 1000b)the length of the telescope tube is 20.02 mc)the image formed is invertedd)all of theseCorrect answer is option 'D'. Can you explain this answer? has been provided alongside types of An astronomical refractive telescope has an objective of focal length 20m and an eyepiece of focal length 2cm.a)the magnification is 1000b)the length of the telescope tube is 20.02 mc)the image formed is invertedd)all of theseCorrect answer is option 'D'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice An astronomical refractive telescope has an objective of focal length 20m and an eyepiece of focal length 2cm.a)the magnification is 1000b)the length of the telescope tube is 20.02 mc)the image formed is invertedd)all of theseCorrect answer is option 'D'. Can you explain this answer? tests, examples and also practice NEET tests.
|
|
Explore Courses for NEET exam
|
|
Suggested Free Tests
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
|
© EduRev
|
Education Revolution
|
Follow Us
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup