Wondered about that, myself.

Studies show this is true by measuring what nerves fire in the visual cortex and at what frequency when a subject is exposed to certain wavelengths of light, but the variation isn't a huge amount. Most of the variation comes from the peak wavelength that your cones are excited by and depends on variations in the pigment inside the cones. Your long wavelength cone might be more "tuned" to a wavlength several nanometers above or below someone else's, resulting in your orange being slightly more yellow or red than someone else's.

Color perception is all kinds of weird.

Splendid link, Kitsune. Thank you.

I wanted to start a company called Single Socks that makes and sells one sock at a time that are mix and match. Making mismatched socks a fashion statement.

my washing machine already does this.....

How about paper paint in a spray can. Every time I go to the post office to mail a box I'm given the third degree and a large, smelly, black magic marker to cross out the words like liquid, cleaner, electric. I haven't time to go buy a box so if I invented a spray that was brown paper bag in a spray can? Like a correction film on a bigger scale? What could the postal-postal worker say then?
(actually don't want to know) would probably reject the box due to potential flammablity, but our lab could work on that.

:rolleyes:

I have always thought it is a terrible waste to have only one strikeable end to a match . Both ends should be strikeable . After all , many people put their used match back in the box .
If both ends were strikeable , you could cut the wood involved in making matches by 50% .

thats a pretty good idea. you should tell a match company. seriously

I thought this was a really great idea until I got the visual of people placing recently extinguished matches back into the box. Matches that possibly have a still glowing ember...

I spit on matches , don't you ?

Spit? Yucky ... wooden matches are such a rarity here, anyway, that I don't think the second head idea would catch on ... except for liability lawyers who would love the idea of your having to grasp the extremely flammable end of an already hot object.

I've never known anyone to put spent matches back into the matchbox.

spent matches go back in the box the other way around, everyone knows that. i dont spit on them, i just shake them. besides, matches are designed to be safe to touch after 2-3 secs after extinguishing them

So what are matches made of over there?

C4

Geezus, I thought I was the only one who thought that. But it does make sense--some people do seem to have a whack sense of color. And of course, to them, it's not at all.

My idea:
Package a variety of blank receipts, and market them to business travellers, that they can submit for meal reimbursements. "Bag o' reciepts".