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42.8 kHz is hardly a light frequency. In fact, it's hardly much of a radio frequency.
It has a wavelength of over 4.3 miles, and is capable of communicating only very
low rates of information, like the time code to the 'atomic' clock in your house,
four times a day.
For comparison, the longest wavelength of visible light is about 0.000026 inch .
Wiki User
∙ 14y ago
TheFrequencyGuy
42.8kHz is definitely not a light frequency, as the other answer mentions. However, there is a light frequency that corresponds to that frequency. If you know anything about music, you know a little about octaves: One note and another can be the same note at different pitches. How this happens is a doubling of frequency. If you are looking for a light frequency that corresponds to 42.8kHz, you have to double it, then double that, and keep doubling until you reach a number that falls within 430-770THz. So if you use your calculator to double the number, you will eventually reach the number 735,289,401,075,200Hz or around 735.3THz(to reach this number you would have to double 34 times). This frequency falls within the Violet range of the visible light spectrum(680-790THz) with a wavelength of about 415 nm.
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