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Some compounds are very strong at absorbing infrared light which has a lengthwave 6.85 nm. What is the frequency of the light in Hertz?

Answer:

                Wavelength x Frequency (v) = Speed (c) 

6.85 nm x Frequency (v) = 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)/6.85 nm

Frequency (v) = (3000 x 1014 nm/s)/6.85 nm

Frequency (v) = 437 x 1014 Hz