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
Answer & explanation
Correct answer: option 2
$E=-R c h \Rightarrow R=-\frac{E}{c h}=-\frac{13.6 \times 1.6 \times 10^{-19}}{3 \times 10^8 \times 6.6 \times 10^{-34}}$
= $1.098 \times 10^7$ per m