JEE Main 2022 Physics question

In normal adjustment, 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:

(A)20 cmCorrect
(B)30 cm
(C)10 cm
(D)15 cm

Answer: (A)

Solution

In normal adjustment the magnification is and the distance

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Question ID VK-034731