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During one of its ambitious project ''IS...

During one of its ambitious project ''ISRP" gathered information through its stallites for a planet in another galaxy. As far as structure of atoms is considered , it is very similar to the structure of an atom in our planet except that
energy of an orbit in which electron resides is `(E_(n))=(45xxZ)/(n=1) eV//"atom".`
If collection of H-atom and `He^(+)` ion makes transition from 2nd orbit and 5th orbit respectively, then total different spectral lines emitted will be :

A

10

B

11

C

6

D

9

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The correct Answer is:
a
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During one of its ambitious project ''ISRP" gathered information through its stallites for a planet in another galaxy. As far as structure of atoms is considered , it is very similar to the structure of an atom in our planet except that energy of an orbit in which electron resides is (E_(n))=(45xxZ)/(n=1) eV//"atom". Calculate wavelength ("in""Å") of photon emitted when electron makes transition from 7th excited state to 1st excited state in H-atom of that planet:

During one of its ambitious project ''ISRP" gathered information through its stallites for a planet in another galaxy. As far as structure of atoms is considered , it is very similar to the structure of an atom in our planet except that energy of an orbit in which electron resides is (E_(n))=(45xxZ)/(n=1) eV//"atom". If photon of wavelength 7nm strikes on an atom of hydrogen on that planet, then wavelength of ejected electron will be approximately:

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