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KVPY Sample Paper KVPY Stream-SX Model Paper-4

  • question_answer
    Ionization potential of hydrogen atom is \[13.6V\], Hydrogen atoms in the ground state are excited by monochromatic radiation of photon energy\[12.1\text{ }\operatorname{eV}\]. The spectral lines emitted by hydrogen atoms according to Bohr's theory will be

    A) One                             

    B) two

    C) Three   

    D) four

    Correct Answer: C

    Solution :

    [c] \[-13.6+12.1=\frac{-13.6}{{{n}^{2}}}\] \[\operatorname{or}n=3.\] The spectral lines corresponding to \[n=3\] Will be \[\frac{n(n-1)}{2}=\frac{3(3-1)}{2}=3\]   


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