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Re: [Phys-L] Blue color heated steel

There is extensive litt. on the three iron oxides’ optical props in the vis. and near IR.

One of them even mentions in the XXX interference colour (thickness, etc.) <>

Unfortunately, I haven’t pressured the UCSC library to give me access serials privilege, which I lost when they changed to password type access. I am a life member of the AAPT, so I’ll see if they have an(my) article(s) on iron oxides opt. props. (close to the subject of my disst.!)

bc …. working on it.

On 2021/Oct/04, at 09:42, John Denker via Phys-l <> wrote:

On 10/4/21 9:28 AM, David Bowman wrote:

*AND* it is 600 degrees F, not 600 K.

600 K = 620.33 °F,
600 °F = 588.7056 K,
607.261 °F = 592.739 K, &
574.5875 °F = 574.5875 K.

That arithmetic is correct, but I'm not sure I see the point.
The temperature range for each color is rather narrow:

Full blue 560 293.3 566.5
Dark blue 570 298.9 572.0
Very dark blue 600 315.6 588.8

I was being charitable to associate any shade of blue with
any kind of 600. Reference:

The point remains, the original question was based on numerous
false assumptions.
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