Question

A teacher sets up the stand carrying a convex lens of focal length 12 cm at 36 A cm mark of an optical bench. He asks 4 students A, B, C and D to suggest the position of the screen on the optical bench so that he is able to obtain a clear image of a distant tree almost immediately. The position suggested by the students are a i) 24.4 cm ii) 33.8 cm jii) 48.4 cm iv) 60.4 cm The correct position was suggested by A.(i) B.(ii) (iii) D.(iv)​

Answer 1

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Answer 2

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