d=2f1+f2 
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 infinity and…
NEET UG 2012 — Physics Optics
2012mcqmedium
A concave mirror of focal length f1 is placed at a distance of d from a convex lens of focal length f2. A beam of light coming from infinity and falling on this convex lens concave mirror combination returns to infinity. The distance d must be equal
Official previous-year question
Held on 30 Apr 2012 · Verified 9 Jul 2026.
Options
- A
f1+f2
- B
−f1+f2
- C
2f1+f2
- D
−2f1+f2
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