Andy Resnick's latest activity

Really excellent photos- both compositionally and technically (exposure, etc)- thanks for posting!

Another altered carbonatite: Altered carbonatite. A veinlet of carbonatite intrudes into an existing carbonatite pluton, bisecting a...

Yes, but the amount of energy radiated by the wire will be much lower than the sun. The amount of energy you need to absorb to protect...

Interesting question- one I had not thought of. First, confined plasmas have a variety of radiation emission mechanisms, not just...

Carbonatite, Fen Complex. This sample has a significant amount of apatite, generally arranged either in aggregations of elongated...

Well.... if you know the emissivity, then I would agree that a commercial IR detector/camera can hit that 5% accuracy. The problem is...

Here is a smaller piece of geology:

Impact crater in Germany Width: 20-24 km Area: 350 sqkm Depth: 100-150 m Date: -15 million years Remark: has an inner wall Asteroid...

Morro Bay This is the core of a volcano and an easy climb to top.

Columnar basalt. This is the Giant's Causeway in Ireland, and is not a photo I took. I did take photos of columnar basalt in Iceland...

Add more cool geology pictures if you have them.

But that's sort of my point- without any 'ground truth' data, it's not possible to accurately determine the temperature of an unknown...

I'm not entirely sure what you mean- for example, MWIR (3-5 micron band) is well suited for imaging 'hot' internal combustion engines...

Speaking of ultra-fast lenses I just want to mention that I have one, and it was quite cheap for being such a fast lens: 7Artisans 35mm...

I think the problem is more difficult than that- the emissivity can vary wildly over the relevant waveband (especially either MWIR or...