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c = λ × f

where c is speed of light (c = 299 792 458 m/s) ,

λ is wavelenght & f is frequency

f = c / λ

we have λ=455 nano meters

then :

f=659 THz and the colur is blue-violet

Note:

1 terahertz (THz) = 103 GHz = 106 MHz = 1012 Hz

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14y ago

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