Question

Determine the frequency of violet visible light (λ = 420 nm) (GIVEN: 1 m = 109 nm)

Answer 1

Given:

The wavelength of the violet visible light is,

`\begin{gathered} \lambda=420\text{ nm} \\ =420*10^(-9)\text{ m} \end{gathered}`

To find:

The frequency

Step-by-step explanation:

The speed of the violet visible light in air is,

`c=3*10^8\text{ m/s}`

The frequency is,

`\begin{gathered} f=(c)/(\lambda) \\ =(3*10^8)/(420*10^(-9)) \\ =7.14*10^(14)\text{ Hz} \end{gathered}`

Hence, the frequency is

`7.14*10^(14)\text{ Hz}`