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JEE Main & Advanced Physics Atomic Physics Question Bank Atomic Structure

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     Figure shows the energy levels P, Q, R, S and G of an atom where G is the ground state. A red line in the emission spectrum of the atom can be obtained by an energy level change from Q to S. A blue line can be obtained by following energy level change                                                [MP PMT 1994]

    A)            P to Q                                      

    B)            Q to R

    C)            R to S                                       

    D)            R to G

    Correct Answer: D

    Solution :

                       If E is the energy radiated in transition                    then \[{{E}_{R\to G}}>{{E}_{Q\to S}}>{{E}_{R\to S}}>{{E}_{Q\to R}}>{{E}_{P\to Q}}\]            For getting blue line energy radiated should be maximum \[\left( E\propto \frac{1}{\lambda } \right)\]. Hence (d) is the correct option.


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