I watched an interesting light show at a bar today. The rows of bottles above the bar had a continuous light bar behind them, a strip about 1/2” high. The light slowly changed through different colors. Most bottles were clear so nothing dramatic. But a green bottle.looked interesting:
…but I remember an odd moment on my ship in the Navy when I went to the ship’s store and bought a box of Good & Plenty and went to my bunk to read and munch on the candy. It was late enough that they had turned the white lights off and turned on the red lights (like in submarine movies), and as I poured the candies into my hand I realized they were absolutely indistinguishable from each other: I could not tell which ones were pink and which ones were white. It was an interesting moment, probably akin to your light show.
Looking at your title, I wonder if the odd colors have something to do with the peaks and troughs of the light waves. You know; constructive and destructive interference and all that high school physics stuff?
Additive color mixing (mixing color lights) as opposed to subtractive mixing (mixing paint colors) gets a little strange at times.
The primary’s are blue, red and green.
You mix red and blue, you get magenta. Perfectly normal, nothing strange at all.
You mix blue and green, you get cyan. Perfectly normal, to be expected
You mix red and green, you get amber……what the fuck, totally unintuitive…..but that’s how it works.
And it does work. If you are actually mixing light colors, the amber is a little trickier, practically speaking….the eye doesn’t tolerate a less than perfect mix of red + green to amber the way it will with the other two combinations, but it works.
I don’t know if this has any bearing on the colored bottles, aside from the fact that colored lights can surprise you.
One of the more interesting thing about colors is that you can perceive as the same color sources that have VERY different spectra. It’s the reason we can get away with color monitors with three colored sources and color printing with only three inks – you can probably find some combination that will give you the shade you’re looking for. It works with a white light source and colored filters, too. But it can lead to confusing situations.
For instance, if I have a yellow color filter and a blue one and look at a white light through both at the same time, it’s likely that I’ll see green The yellow and blue filters usually have a green area between them that both will transmit.
But if I have a yellow bandpass filter that only transmits, say, 580 nanometers (nm) and a blue bandpass filter that only transmits 450 nm, the combination of the two will transmit nothing. And you can arrange for the blue bandpass filter to look just like your wide-band filter and the yellow onw to look like your original broadband yellow filter. So identical -looking yellow and blue filters might transmit green if added together, or might transmit nothing. (Things can get more interesting if you use one bandpass filter and a broadband filter, provided the broadband filters are broad enough. A blue broadband plus a yellow bandpass might look yellow – although dim. And a yellow broadband and a blue bandpass might look blue.)
So it’s hard to say anything about your original set of filters without knowing the spectral makeup of the filters and the light source being used.