Civil Engineering - Surveying - Discussion

4. 

Pick up the correct statement from the following :

[A]. the eyepiece plays no part in defining the line of sight
[B]. the diaphragm plays no part in defining the line of sight
[C]. the optical centre of the objective plays no part in defining the line of sight
[D]. none of these.

Answer: Option A

Explanation:

No answer description available for this question.

Sri said: (Aug 1, 2013)  
Diaphragm, optical centre are part of the telescope and those are very important to observe the line of sight.

Sumit said: (Nov 20, 2013)  
Is eyepiece not a part of the telescope?

Aman said: (Feb 5, 2014)  
Line of Sight: It is line passing through the cross hair and optical centre of objective lens. However Eyepiece only clarifies the cross hair in diaphragm. Thus Eye piece plays no important role in defining the line of sight.

Asha said: (Feb 16, 2014)  
Line of sight does not have any relation with eyepiece.

Saravana Moorthy said: (Jul 7, 2014)  
Eyepiece is used only for magnification purpose whereas the other two defines the line of sight.

Bujji said: (Jan 21, 2015)  
The eye piece is not require for line of sight.

Pratapsinha said: (Aug 5, 2015)  
Eyepiece is just part of telescope and line of sight is line passing through center of cross hair on zooming glasses.

Akshata said: (Sep 25, 2015)  
Eyepiece is used only for enlargement.

Santhosh said: (Jun 27, 2016)  
Which role plays to determine the line of sight?

Vivek said: (Jul 14, 2016)  
Eyepiece is a part of telescope. It used for enlargement.

Akashdeep said: (Sep 17, 2016)  
The eyepiece is used only for enlargement.

Suresh said: (Sep 25, 2016)  
The eyepiece is used only for clarifying crosshairs.

K.P.Ahir said: (Sep 29, 2016)  
The eyepiece is used only for clarifying crosshairs.

Mubashar Hassan said: (Dec 2, 2016)  
Eye piece is used for only magnifying the cross hair.

Pankaj Yadav said: (Apr 7, 2017)  
The line passing through Centre of cross hair and objective lense to cross staff called a line of sight. No matter of eye-piece.

Ajay Kumar Verma said: (Jun 3, 2017)  
Eyepiece is a part of telescope and is used for enlargement.

Aman Singh Rajpur said: (Dec 28, 2017)  
I think it should be option B.

According to D V GUPTA survey book. He says that line of sight is the line which passes through the optical centers of both glasses i.e. eyepiece & object glass towards the object.

Kiran Pathade said: (Jan 24, 2018)  
Eyepiece is only used for zooming the cross hair of diaphragm.

Rabindra said: (May 1, 2018)  
Nice, explanation Thanks @Kiran.

Muzaan Ul Aazeem said: (Jul 16, 2018)  
It plays some rule while we defining a line of sight, so option B is correct.

Aditya Kumar said: (Jul 18, 2018)  
Line of sight is defined as the line joining the cross hair and optical center of objective, so option A is correct.

Venky said: (Aug 1, 2018)  
Eye pice is not useful for defining the Line of sight.

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