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State the frequency of blue light in Hertz which has a wavelength of 430 nm

Answer:

                Wavelength x Frequency = Speed

430 nm x Frequency = 3.00 x 108 m/s

                C (speed) is defined to be the rate of travel of all electromagnetic energy in a vacuum and is a constant value—speed of light.

Frequency (v) = (3.00 x 108 m/s)/430 nm

Frequency (v) = (3000 x 1014 nm/s)/430 nm

Frequency (v) = 6,97 x 1014 Hz