We are being asked to calculate the frequency of blue light with a wavelength equal to 470 nm.

Wavelength, frequency, and the **speed of light** are connected by the following equation:

$\overline{){\mathbf{c}}{\mathbf{=}}{\mathbf{\lambda \nu}}}$

c = speed of light, m/s

λ = wavelength, in m

ν = frequency, Hz (Hertz)

We can rearrange the equation to isolate the frequency (v):

The wavelength of some blue light is 470.0 nm. What is the frequency of this blue light?

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