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I've always wondered why this happens...

(30 Posts)
Wallace Sat 02-Apr-05 21:27:39

When there is red writing on a blue background, (or vice versa), why does it look like it is flashing if you catch sight of it out of the corner of your eye?

Wallace Sat 02-Apr-05 21:35:00

Maybe it's just me

snafu Sat 02-Apr-05 21:35:59

No, it's not just you - but I don't know why it happens either lol

Wallace Sat 02-Apr-05 21:37:48

Glad it is not just me! Somebody here must know the answer...surely on mumsnet there is always someone who knows?

snafu Sat 02-Apr-05 21:39:37

omg, maybe this is going to be The Question That Has No Answer (On Mumsnet At Least)

RTMTMML Sat 02-Apr-05 21:41:33

(quick hijack)

Snafu, did you get the stuff I sent you? I found envelope in DH's bag and ended up posting it myself.

(hijack over)

Wallace Sat 02-Apr-05 21:45:30

Gosh, if it is "The Question That Has No Answer (On Mumsnet At Least)" I feel very privileged.

However as soon as they see this it will become a challenge, and be solved in two minutes

SoupDragon Sat 02-Apr-05 21:46:41

- The human eye can only ever effectively focus on Green (and also Yellow).
- Red and Blue are seen as blobs and often the brain compensates.
- This is made worse by the condition of your eyes.
- There is a marked variation between the colours and the eye simply cannot
focus on them all.
- The wavelength of red (700nm) is almost double that of blue (400nm).
- if the object is close the eye often notices a fake 3D effect (some web
sites use this effect on a black background).
- because of the focussing it thinks that the objects are at different

Wallace Sat 02-Apr-05 21:47:03

I've just had an idea....

RTMTMML Sat 02-Apr-05 21:47:43

did you google that soupy or are you, as we all know, just incredibly clever?

snafu Sat 02-Apr-05 21:47:52

Yes - got it this morning! Thank you. Oh, and you've just reminded me I need to forward you something from abel&cole. They are having trouble locating your account - maybe because you get the delivery through school? Anyway I'll the email on to you and if you want the freebies you can give them your address directly - probably easier that way!

Sorry for hijack Wallace!

RTMTMML Sat 02-Apr-05 21:48:05

what's your idea Wallace?

snafu Sat 02-Apr-05 21:48:13

Gaaaaah soupy!

Dior Sat 02-Apr-05 21:48:56

Message withdrawn

Wallace Sat 02-Apr-05 21:49:05

Bu**er you! Only one minute! I was just about to post it as a new thread with the title "The Question That Has No Answer (On Mumsnet At Least)" to get a bit more of a response

Wallace Sat 02-Apr-05 21:50:47

I think she must have googled it?

RTMTMML Sat 02-Apr-05 21:50:48

why not do it anyway Wallace and make a question up?

SoupDragon Sat 02-Apr-05 21:52:00

Google obviously!

I think, basically, blue and red are at opposite ends of the spectrum.

SoupDragon Sat 02-Apr-05 21:52:57

The 7inch of "Wham Rap" was red writing on a blue background and I remember that jumping on the cover

Wallace Sat 02-Apr-05 21:53:42

Oooh that is tempting! But I must go to bed. I must go to bed. I must go to bed. Dh is away and I am spending far too much time on the computer, and not getting enough sleep. Early start tomorrow.

I'll be gracious and let someone else have the thread title, and check back in the morning to see what happened

Wallace Sat 02-Apr-05 21:54:53

Evidence that I must go to bed if I managed to type it three times!

Right. I'm gone.

snafu Sat 02-Apr-05 21:55:10

Yes, I used to have a Noddy annual that had jumpy-out red writing on a blue background. Not quite as cool as Wham Rap, but then I am not a dragon.

Cadbury Sat 02-Apr-05 22:07:32

Is there nothing you don't know about Soupy? You truly are the oracle

SoupDragon Sat 02-Apr-05 22:15:41

<<preens self with pointy tip of tail>>

I just hate unanswered questions!! I can't see a question on MN without feeling the need to Google it.

RTMTMML Sat 02-Apr-05 22:16:56

soupy? How longs a piece of string? ROFL

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