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NEET 2012
Exam
NEET
Year
2012
Subject
Physics
Chapter
Ray Optics

NEET 2012 · Physics · Ray Optics

A concave mirror of focal length f_1 is placed at a distance of d...

A concave mirror of focal length f1f_1 is placed at a distance of dd from a convex lens of focal length f2f_2. A beam of light coming from infinity and falling on this convex lens concave mirror combination returns to infinity. The distance dd must be equalA 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

Options

  1. Af1+f2f_1+f_2
  2. B−f1+f2-f_1+f_2
  3. C2f1+f22 f_1+f_2
  4. D−2f1+f2-2 f_1+f_2

Correct answer

C. 2f1+f22 f_1+f_2

Step-by-step solution

d=2f1+f2d=2 f_1+f_2 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
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