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Q.1059 A concave mirror of focal length f1 is placed at a distance 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 returms to infinity. The distance d must equal: |
| Answer» Q.1059 A concave mirror of focal length f1 is placed at a distance 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 returms to infinity. The distance d must equal: | |