Physics · 2011
NEET 2011 · Mains · Code B · Q119
A converging beam of rays is incident on a diverging lens. Having passed through the lens the rays intersect at a point 15 cm from the lens on the…
A converging beam of rays is incident on a diverging lens. Having passed through the lens the rays intersect at a point $\displaystyle 15$ cm from the lens on the opposite side. If the lens is removed the point where the rays meet will move $\displaystyle 5$ cm closer to the lens. The focal length of the lens is :
Official answer
(3)
$\displaystyle 30$ cm
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NEET (UG) 2011 Physics question, with the answer from NTA’s final answer key. Where our answers come from.