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Phototransistor

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Thread Starter

Alasttt

Joined May 13, 2015
68
WBahn said:
A light source being modulated at 20 kHz in now way means that the wavelength of the light is 15 km. You are confusing very different concepts. The wavelength of the light is related to the color of the light. If you take a red laser pointer and flick it on and off, does the color change? Also, according to your reasoning, if you had a light source that was on continuously it would be DC and have an infinite wavelength. Does that make sense?
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Yeap that makes sense I had the wrong idea. The LED datasheet should specify the wavelength of the light coming out and going through the fibre.
 
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