When an astronomical telescope is in normal adjustment, the focal length of the objective lens is 50cm and that of the eye piece is 5.0cm. What is the distance between the lenses?
a
10.0cm
b
30.0cm
c
45.0cm
d
55.0cm
e
250.0cm
Explanation
Correct Option
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Discussions (6)
kenechukwu2002
7 years ago
under normal adjustment the distance between the two lenses is the subtraction of the focal length of the eye piece from the focal lenght of the objective lens and is related by the formula .
D=FO-FE
olami1600
3 years ago
please 
explanation
I don't even understand how they derived at the answer because My own answer is different
