Question

hlo..
plz tell the methodology on application of lens​

Answer 1

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It depends on the objective and eyepiece characteristics. Let be assumed that the lens is in the air. Thus, its rear principal point is superimposed with its rear nodal point. The nodal slide method uses the property that the image is not shifted when the lens is rotated about its rear nodal point.

Answer 2

Answer:

$\huge\tt\green{Answer:}$

It depends on the objective and eyepiece characteristics. Let be assumed that the lens is in the air. Thus, its rear principal point is superimposed with its rear nodal point. The nodal slide method uses the property that the image is not shifted when the lens is rotated about its rear nodal point.