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## Homework Statement

The speed of light is [tex]3 \times 10^8 ms^{-1}[/tex]. Calculate the frequency of red light of wavelength [tex]6.5 \times 10^{-7} m[/tex].

## Homework Equations

[tex]v = f\lambda[/tex]

[tex]f = \frac{v}{\lambda}[/tex]

## The Attempt at a Solution

[tex]v = 3 \times 10^8 \ ms^{-1}[/tex]

[tex]\lambda = 6.5 \times 10^{-7} \ m[/tex]

[tex]f = \frac{3 \times 10^8 }{6.5 \times 10^{-7} }[/tex]

[tex]f = 4.6 \times 10^{14} Hz[/tex]

[tex]f = 450 THz[/tex]

Is my answer correct?