Answer to Question #225845 in Electricity and Magnetism for Arvin Shopon

Question

The wavelength of the green laser of the light effect device is 531 nm.

What is the frequency of such light?

Answer 1

$λ = 531 \;nm = 531 \times 10^{-9} \;m \\ f=\frac{c}{λ}$

Light velocity $c = 3 \times 10^8 \;m/s$

$f = \frac{3 \times 10^8}{531 \times 10^{-9}} = 5.65 \times 10^{14}\;Hz$

Answer: $5.65 \times 10^{14}\;Hz$