MCQ
Ritz combination principle is :
  • ${\nu ^ - } = {R_H}({z^2})\left[ {\left. {\frac{1}{{{n^2}_1}} - \frac{1}{{{n_2}^2}}} \right]} \right.$
  • B
    ${E_n} = \frac{{ - 2{\prod ^2}m{z^2}{e^4}}}{{{h^2}}}$
  • C
    $E = \frac{{hc}}{\lambda }$
  • D
    none

Answer

Correct option: A.
${\nu ^ - } = {R_H}({z^2})\left[ {\left. {\frac{1}{{{n^2}_1}} - \frac{1}{{{n_2}^2}}} \right]} \right.$
a

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