V1−−2001=401
V1=55401−2001
=2005−2001
V1=2004=501
V=50
∴d=50+4=54cm
A astronomical telescope has objective and eyepiece of focal lengths 40cm and 4cm respectively. To view an object 200cm away from the objective, the lenses must be separated by a distance:
Held on 30 Apr 2016 · Verified 9 Jul 2026.
37.3cm
46.0cm
50.0cm
54.0cm
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