Physics · 2012
NEET 2012 · Prelims · Code A · Q35
The magnifying power of a telescope is 9. When it is adjusted for parallel rays the distance between the objective and eyepiece is 20 cm. The focal…
The magnifying power of a telescope is 9. When it is adjusted for parallel rays the distance between the objective and eyepiece is $\displaystyle 20$ cm. The focal length of lenses are :
Official answer
(1)
$\displaystyle 18$ cm, $\displaystyle 2$ cm
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