A convex lens with 198 is mounted 400 to the left of a
A convex lens with 19.8 is mounted 40.0 to the left of a concave lens. When an object is placed 31.0 to the left of the convex lens, a real image is formed 59.3 to the right of the concave lens. What is the focal length of the concave lens?
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a convex lens with 198 is mounted 400 to the left of a concave lens when an object is placed 310 to the left of the
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