does anyone sharpie thier CD's???

Red: 780 nm, Orange: 620 nm, Yellow: 585 nm, Green: 570 nm,
Blue: 490 nm, Indigo: 440 nm, Violet: 420 nm

Purple is shorter wavelength than Green. Since the light from a CD laser is Red (780 nm) then purple, being further from red than green, will filter out more red light. Therefore purple will be more effective than green, as a filter.

Another factor is that purple has six letters and green has only five but nobody will buy that argument...

Shadorne - No, the color purple will better *reflect* red than will the color green. That's the (scientific) problem with the argument for purple. To make the issue even more confusing, 780nm is not really red, but infrared (not visible).

Cheers, GK

09-30-07: Freemand
Metro, is there science to the cleaver little clock? Do you know of any. If there is no science does that mean the clock can't work and its that dreaded audiogon word "placebo effect".

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You're kidding, right?

I didn't see a smiley so I had to check.

Kidding about what?? I want to know if there is science or any known science in the cleaver little clock.

I was also curious, that if there is no known science, then does a product not work and its placebo cause of no science?

They seem like reasonable questions. There just seems to be many on here that say if there is no science in a product it's your imagination or placebo effect.