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radiant hot

Posted by pnbrown z6.5 MA (My Page) on
Sat, Jan 12, 13 at 22:04

Trying to explain to a friend that infrared saunas are not some sort of modern magic. The hot metal of a wood stove emits infrared radiation, as does an incandescent lightbulb.

Any radiant heat is emitting partly or entirely in the infrared wavelength, right? Nothing extraordinary about it, I don't believe.

Follow-Up Postings:

RE: radiant hot

I believe you are correct.

"Examples of thermal radiation include the visible light and infrared light emitted by an incandescent light bulb, the infrared radiation emitted by animals and detectable with an infrared camera, and the cosmic microwave background radiation. Thermal radiation is different from thermal convection and thermal conduction-a person near a raging bonfire feels radiant heating from the fire, even if the surrounding air is very cold."

Here is a link that might be useful: Thermal radiation

RE: radiant hot

Yes, when they are facing the fire, their faces feel the heat, they are still freezing their butts off.

Is it the word "infrared" your friend is grappling with, Brown?

RE: radiant hot

A black body will absorb light energy while a white object will reflect most of the energy. The conversion of the light to heat in the black body will result in infrared re-radiation from the black body.

RE: radiant hot

Hmm, never thought about it! But, white man build big fire, stay back, keep cold; injun build small fire, stay near, keep warm??

RE: radiant hot

He's absolutely besotted because he met somebody who has an infrared sauna. He's the kind of guy where every new (as in, latest kick that he's onto) has to be quasi-magical.

So, the conversation went like this, me:

"how is this any different from being in front of a fire or a stove?"

him, outraged: "what are you talking about?"

me: "I think any radiant heat might be infrared"

him: "no, this machine has special emitters that give out infrared, other things don't"

me: "a-uh"

And so another great Google quest began.....

RE: radiant hot

Wow! an original example of myopia.

Where's the steam?

RE: radiant hot

At the ballpark the hot dogs are cooked and kept hot under *infrared* lights! (Not that they are necessarily safe to eat.)

RE: radiant hot

Have a saugy and relax...

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