flabberghaster

flabberghaster OP wrote

Reply to comment by hollyhoppet in Raspberry pi hired a cop 😔 by flabberghaster

I've wanted to play with one for a long time, but I could not find any when I searched (couple years ago, during a supply shortage) and I did not search hard because I couldn't think of any actual, practical use to justify spending money on one beyond playing with it.

I was thinking of trying to set up a small NAS on it or something but I already have a NAS.

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Submitted by flabberghaster in just_post (edited )

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flabberghaster OP wrote (edited )

Reply to comment by twovests in If light is just electromagnetic waves, and color is just different frequencies of light, and we can make radio waves at arbitrary frequencies, why can't we create visible light of arbitrary pure colors? by flabberghaster

This is the question I had! Nice! Thank you!

I always thought a laser was special just because all the photons were in the same orientation and so they didn't cause interference from one another, so it appeared more intense and stayed in a tight beam. I did not know you could also in theory use them to create different wavelengths.

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flabberghaster OP wrote

Reply to comment by voxpoplar in If light is just electromagnetic waves, and color is just different frequencies of light, and we can make radio waves at arbitrary frequencies, why can't we create visible light of arbitrary pure colors? by flabberghaster

There is no single frequency of light that will stimulate the different types of cones in the correct levels for you to perceive magenta, that only occurs if there is a mix of frequencies hitting your eyes that stimulate the blue and red cones a lot without stimulating the green cones, and as the green cone range lies somewhere in between the red and blue cone range that can't happen with a single frequency.

That I know. It's more a question of why we can't create light at arbitrary wavelengths, not why we can't create any given color using only a single wavelength.

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flabberghaster OP wrote

Reply to comment by neku in If light is just electromagnetic waves, and color is just different frequencies of light, and we can make radio waves at arbitrary frequencies, why can't we create visible light of arbitrary pure colors? by flabberghaster

No they use three different color lights and mix them at different intensities and it looks to our eye like that color. What I mean is why can't we create arbitrary, single frequency colored lights when we can do that with radio waves? Is it just because we don't know how to do it in that range?

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