Manipal Medical Manipal Medical Solved Paper-2014

  • question_answer
    We combined a convex lens of focal length and \[{{f}_{1}}\]concave lens of focal length \[{{f}_{2}}\] and their combined focal length was F. The combination of these lenses will be have like a concave lens, if

    A) \[{{f}_{1}}\le {{f}_{2}}\]                   

    B) \[{{f}_{1}}={{f}_{2}}\]

    C) \[{{f}_{1}}<{{f}_{2}}\]                      

    D) \[{{f}_{1}}>{{f}_{2}}\]

    Correct Answer: D

    Solution :

    If one of the lens is convex and the other is concave, then it behaves like concave lens, if \[{{f}_{1}}>{{f}_{2}}\] and it behaves like a convex lens, if\[{{f}_{1}}<{{f}_{2}}\]. and it behaves like a plane mirror, if  \[{{f}_{1}}={{f}_{2}}\].


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