Question

 Solve the problems and show the complete solution.

Determine the frequency of the following: (GIVEN: 1 nm = 10-9 m)

a. red visible light (λ = 650 nm or nanometer)

b. violet visible light (λ = 420 nm)

Answer 1

a. The frequency of red visible light with λ = 650 nm is

$$f=\frac c\lambda=4.62·10^{14}\text{ Hz}.$$

b. The frequency of violet visible light with λ = 420 nm is

$$f=\frac c\lambda=7.14·10^{14}\text{ Hz}.$$