A) 4 cm
B) 40 cm
C) 44 cm
D) 440 cm
Correct Answer: B
Solution :
Key Idea: To see with relaxed eye final image should be formed at infinity. The distance between the objective and eyepiece is adjusted so that image A'B' formed by objective is at focus \[{{F}_{e}}'\] of the eyepiece. This adjustment of telescope is called normal adjustment. In this position the length of the telescope is \[{{f}_{o}}+{{f}_{e}}\] (\[{{f}_{o}}\]is foca1 length of objective, \[{{f}_{e}}\]of eyepiece)You need to login to perform this action.
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