In normal adujstment, for a refracting telescope, the distance between objective and eye piece is 30 ~cm. The focal length of the objective, when the angular magnification of the telescope is 2, will be:

Optics: JEE Main 2022 Physics question

JEE Main 2022 · 28 Jul, Morning shift · Q7070

JEE Main 202228 Jul, Morning shiftPhysicsEasyOptics190× since 2002

In normal adujstment, for a refracting telescope, the distance between objective and eye piece is

30 \mathrm{~cm}

. The focal length of the objective, when the angular magnification of the telescope is 2 , will be :

JEE Main 2022 · 28 Jul, Morning shift · Q7070

JEE Main 202228 Jul, Morning shiftPhysicsEasyOptics190× since 2002

In normal adujstment, for a refracting telescope, the distance between objective and eye piece is

30 \mathrm{~cm}

. The focal length of the objective, when the angular magnification of the telescope is 2 , will be :