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NEET2012PhysicsRay OpticsActual

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

Options

  1. Af₁+f₂
  2. B-f₁+f₂
  3. C2 f₁+f₂
  4. D-2 f₁+f₂

Correct answer

C. 2 f₁+f₂

Step-by-step solution

d=2 f₁+f₂

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