Question

The frequency of light of wavelength 5000 A^o is:
A) 1.5 x 10⁵ Hz
B) 6 x 10⁸ Hz
C) 7.5 x 10¹⁵ Hz
D) 6 x 10¹⁴ Hz

Answer 1

Dear Student,

$$\begin{gathered} \mathrm{We}\mathrm{know}\mathrm{that} \\ \mathrm{c}=\mathrm{\lambda \nu } \\ \mathrm{\nu }=\frac{\mathrm{c}}{\mathrm{\lambda }} \\ \mathrm{\nu }=\frac{3\times {10}^8}{5000\times {10}^{-10}} \\ \mathrm{\nu }=6\times {10}^{14}\mathrm{Hz} \end{gathered}$$