• # question_answer Hydrogen atoms in a sample are excited to $n=5$  states and it is found that photons of all possible wavelengths are present in emission spectra. The minimum number of hydrogen atoms in the sample would be A)  5                                 B)  6                   C)  10                               D)  infinite

The wavelengths present in emission spectra are shown in the figure below $(\Delta \phi ={{\phi }_{2}}-{{\phi }_{1}})$ one atom$T=\frac{2\pi }{\omega }$ one atom  Remaining all by individual atoms.