If in Rmsden's eyepiece,the field lenses...

If in Rmsden's eyepiece,the field lenses have focal lengths `f_1` and `f_2` respecrtively and separted by a distance d,then

`f_1=f_2` and `d=f_1+f_2`

`f_1=f_2` and `d=2f_1//3`

`f_1=3f_2` and `d=f_1+f_2`

`f_1=2f_2 //3` and `d=2f_1//3`.

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MODERN PUBLICATION-UNIT TEST -06-EXERCISE

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