Question

The shortest wavelength in the absorption spectrum of hydrogen (R = 1.096 × 10⁷ m^–1) is –

• A. 91.6 nm
• B. 80.4 nm
• C. 9.16 nm
• D. None

Answer 1

Answer: (A)

91.6 nm

Answer 2

$\frac{1}{\lambda}$ = R $\left\lbrack \frac{1}{1^{2}}–\frac{1}{\infty^{2}} \right\rbrack$ = $\frac{1}{\lambda}$= R

l = $\frac{1}{R}$ = 916 × 10^–10 m = 91.6 nm