Charles Link's latest activity

Perhaps worth noting (in retrospect) that you will get this equation directly by implementation of @GiorgioPastore 's suggestion in post...

I thought @hutchphd 's of post 49, (see also post 52) was simpler. I think this latest (post 73) I would call "a" most efficient...

I think the simplest way to get the result is by using the triangle with sides 2, 11, and AB in the modified figure below. The length of...

He was one of the smarter ones on here. We will miss him.

@DaveC426913 I am still waiting to see most of the geese fly south. I don't think most of them have gone south yet. If they did, I...

I don't know what it's like elsewhere, but we didn't get fall here. The trees were still green as October turned into November. They've...

Granddaughter: "Poopah, can we build a snowman?" Poopah: "🎵 DO YOU WANNA 🎵BUILD A SNOWMAAAAAAA—" Granddaughter: "NO Poopah! Not THAT...

Yesterday I built a snowman for the first time this millenium. Grandkids were going stir crazy and every else was too busy or too...

The above is a photo of a 4'6" snowman that I made today, Monday 11-10-25, in Chicago. It is the first one for this season. We had...

In that case, one would need additional spectral detail, such as measuring with two or more bands.

I was able to use it to determine the temperature of a calibration blackbody source with known aperture size at close range, ( distance...

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

I imagine the surface electron activity in 'cool condensed matter' will be subject to that much more than surfaces of stars at thousands...

Add more cool geology pictures if you have them.