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Graham's Hierarchy of Disagreement
The black/white video skated over the elephant in the room! Skin temperature is regulated by perspiration and blood flow,* pretty much independent of ambient, if your clothing is reasonably insulating - which a robe certainly is because it traps a lot of air. *blood being cooled by evaporation in the lungs if the external skin surface is insulated.
we have seemingly contradicting results
I've seen other videos using black and white balloons. Black balloons exploded when the beam of a burning laser pointer hit them, while white balloons survived.So, we have seemingly contradicting results.
Laser heating was proposed in the Sixties for drilling caries out of teeth. Healthy enamel is highly reflective but decayed material tends to be brown or black and thus strongly absorbent, so you can ablate it with an optical laser.
Quote from: hamdani yusuf on 27/11/2022 05:46:13we have seemingly contradicting resultsIt only seems that way to you.
It also doesn't seem contradicting for anyone who doesn't know them, or doesn't want to think about them.
Quote from: hamdani yusuf on 28/11/2022 06:31:12It also doesn't seem contradicting for anyone who doesn't know them, or doesn't want to think about them.It doesn't seem contradictory for anyone who thinks about it (because the explanation is obvious), or for anyone who does not think about it (because they don't notice anything odd).So, it seems that you are the only one who sees a contradiction.Can you tell us what that contradiction is?
At least an explanation should be provided to have caused the difference.
Skin temperature is regulated by perspiration and blood flow,* pretty much independent of ambient, if your clothing is reasonably insulating - which a robe certainly is because it traps a lot of air.
Quote from: hamdani yusuf on 28/11/2022 13:27:17 At least an explanation should be provided to have caused the difference.It was.Quote from: alancalverd on 26/11/2022 14:41:54Skin temperature is regulated by perspiration and blood flow,* pretty much independent of ambient, if your clothing is reasonably insulating - which a robe certainly is because it traps a lot of air. Now, I accept that there are other factors involved (for example, windspeed), but none of them is "unknown to science".So there's no "contradiction" here, just different circumstances.
Scientific investigation aims to eliminate wrong hypotheses by confronting them with related observation results.
How do you think wind speed change the results for black and white balloons?
Enough air blowing past the balloon might stop it heating up enough for the rubber to soften and might stop it bursting.
Quote from: Bored chemist on 29/11/2022 08:41:20Enough air blowing past the balloon might stop it heating up enough for the rubber to soften and might stop it bursting.Do you think that eliminating wind would make black clothes feel hotter than the white one?
So, we have seemingly contradicting results.
It depends on other things, like whether the sun is shining, how brightly, and how windy it is.Are you unable to understand that something may be due to a combination of factors?
Quote from: Bored chemist on 30/11/2022 08:54:22It depends on other things, like whether the sun is shining, how brightly, and how windy it is.Are you unable to understand that something may be due to a combination of factors?Do you understand how they combine to produce observed results?
But none of those is unknown to science.There is no contradiction.You were simply wrong when you said thisQuote from: hamdani yusuf on 27/11/2022 05:46:13So, we have seemingly contradicting results.
Quote from: hamdani yusuf on 30/11/2022 13:30:48Quote from: Bored chemist on 30/11/2022 08:54:22It depends on other things, like whether the sun is shining, how brightly, and how windy it is.Are you unable to understand that something may be due to a combination of factors?Do you understand how they combine to produce observed results?Yes thanks.
You can keep it for yourself, or share it with other forum members here.
Quote from: hamdani yusuf on 30/11/2022 13:34:02You can keep it for yourself, or share it with other forum members here.It's not a secret; but the answer is "it depends" which seems to upset some people.But I'm curious.Did you not realise that the answer was going to be "it depends"?