- #1
Bostonpancake0
- 42
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Which two of the following lenses could be used to construct a telescope?
Focal lengths: 20cm/1cm/100cm/5cm/10cm/2cm/25cm/75cm
(a.) That magnifies 20x and has a length of approx 1.0m
(b.) magnifies by 15x
(c.) magnifies 50 x
I used magnification=telescope focal length/eye piece length (Lense)
but am confused when they save two of the following lenses can be be used??
Focal lengths: 20cm/1cm/100cm/5cm/10cm/2cm/25cm/75cm
(a.) That magnifies 20x and has a length of approx 1.0m
(b.) magnifies by 15x
(c.) magnifies 50 x
I used magnification=telescope focal length/eye piece length (Lense)
but am confused when they save two of the following lenses can be be used??