Ionization energy of hydrogen is 13.6 eV

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Target Exam

CUET

Subject

Physics

Chapter

Atoms

Question:

Ionization energy of hydrogen is 13.6 eV. If h = 6.6 × 10^-34 J-sec, the value of R will be of the order of

Options:

10¹⁰ m^-1

10⁷ m^-1

10⁴ m^-1

10^-7 m^-1

Correct Answer:

10⁷ m^-1

Explanation:

$E=-R c h \Rightarrow R=-\frac{E}{c h}=-\frac{13.6 \times 1.6 \times 10^{-19}}{3 \times 10^8 \times 6.6 \times 10^{-34}}$

= $1.098 \times 10^7$ per m