Physics-
General
Easy

Question

An object is placed infront of a converging lens at a distance equal to twice the focal length f subscript 1 end subscript of the lens. On the other side of the lens is a concave mirror of focal length f subscript 2 end subscript separated from the lens by a distance 2 open parentheses f subscript 1 end subscript plus f subscript 2 end subscript close parentheses. Light from the object pass rightward through the lens, reflects from the mirror, pass leftward through the lens and forms a final image of the object.

  1. The distance between the lens and the final image is equal to 2f subscript 1 end subscript.    
  2. The distance between the lens and the final image is equal to 2(f subscript 1 end subscript + f subscript 1 end subscript)    
  3. The final image is real, inverted and of same size as that of the object    
  4. The final image is real, erect and of same size as that of the object    

The correct answer is: The final image is real, inverted and of same size as that of the object


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