Physics · 2012
NEET 2012 · Prelims · Code A · Q37
A concave mirror of focal length ' f_1 ' is placed at a distance of 'd' from a convex lens of focal length ' f_2 '. A beam of light coming from…
A concave mirror of focal length '$\displaystyle f_1$' is placed at a distance of 'd' from a convex lens of focal length '$\displaystyle f_2$'. A beam of light coming from infinity and falling on this convex lens - concave mirror combination returns to infinity. The distance 'd' must equal :
Official answer
(1)
$\displaystyle 2 f_1+f_2$
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NEET (UG) 2012 Physics question, with the answer from NTA’s final answer key. Where our answers come from.