Chemistry · Structure of atom

Calculate the frequency of violet light having a wavelength of \( 400 \text{ nm} \).

1. A
   \( 5.00 \times 10^{14} \text{ Hz} \)
2. B
   \( 7.50 \times 10^{14} \text{ Hz} \)
3. C
   \( 3.00 \times 10^{14} \text{ Hz} \)
4. D
   \( 1.20 \times 10^{15} \text{ Hz} \)