So I am having trouble with this problem… Problem #1: Light with a frequency of 7.26 x 1014 Hz lies in the violet region of the visible spectrum.

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So I am having trouble with this problem…

Problem #1: Light with a frequency of 7.26 x 1014 Hz lies in the violet region of the visible spectrum. What is the wavelength of this frequency of light?

I know how to substitute things in, the only problem I’m having, is how did they go from this

(x) (7.26 x 1014 s¯1) = 3.00 x 108 m s¯1

to this…

x = 4.13 x 10¯7 m

Just let me know, thanks!!