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Three photons originating from excited atomic hydrogen atoms are found to have energies of $0.66 e V, 1.89 e V$ and $2.55 e V$ respectively. The minimum no. of atoms that must be present are :

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one atom

two atoms

three atoms

can't say

answer is B.

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Detailed Solution

Here; the number no. of atoms that must be present are;

$[0.66 + 1.89 = 2.55 eV]; [2.55 eV]$

1st atom 2nd atom

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