Chemistry - Atomic Structure Question with Solution | TestHub

1. Given wavelength, $\lambda =600nm=6\times 10^{-7}m$. Using $c=\nu \lambda$,

$$\nu =\frac{3\times 10^8}{6\times 10^{-7}}=5\times 10^{14}{s}^{-1}$$

so (B) is correct.

2. Wavenumber:

$$\bar{\nu }=\frac{1}{\lambda }=\frac{1}{6\times 10^{-7}}=1.67\times 10^6{m}^{-1}$$

so (C) is incorrect.

3. Convert wavelength into Å:

$600nm=6000\mathring{A}$

4. Photon energy:

$$E=\frac{12400}{6000}=2.07eV$$

so (D) is correct.

5. Hence, the correct options are B, D.