question_answer

A astronomical telescope has objective and eyepiece of focal lengths 40 cm and 4 cm respectively. To view an object 200 cm away from the objective, the lenses must be separated by a distance                         [NEET - 2016]

A)  37.3 cm           

B)       46.0 cm

C)  50.0 cm           

D)       54.0 cm

Correct Answer: D

Solution :

[d] Using lens formula for objective lens

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