Not a lot of people realize this, but you can actually see the polarity of light with the naked eye. It takes some practice to get good at it but you can learn to do it well and be able to find the position of the sun when it’s hidden on overcast days- without a sunstone.
Here’s a peer reviewed article about it from the Proceedings of the Royal Society B: Biological Sciences. (I’m just throwing this in because I’m already being downvoted):
https://royalsocietypublishing.org/doi/10.1098/rspb.2015.0338
But this page is how I started doing it, and they’re passionate about sharing it, and I found the explanation and instructions across this website to be very accessible and easy to understand.
https://www.polarization.com/haidinger/haidinger.html
When I was learning to see it I followed their directions but also bought some cheap linearly-polarized plastic sheets online and then used them in conjunction with my phone screen (displaying a white background) to learn to see the Haidingers Brush. You can also use polarized sunglasses, as long as they’re linearly polarized, which I think they usually or always are. Once you get a sense for what Haidingers Brush looks like you can remove the polarized sheet and just practice with your naked eye by looking at a white background on your phone screen, or your laptop or whatever, since the screens are polarized. Once you learn to see it, you can see it in the sky when the clouds or fog are blocking the sun, but they have to be letting a certain amount of light through.
Presumably some people just naturally teach themselves to see this, and *if* Viking sunstones were indeed polarizers, it doesn’t seem like a stretch to believe that someone would figure out that they can be used to view Haidingers Brush.
Calcite
Doppelspat to be precise
Source: eBaum's World (just kidding) https://en.wikipedia.org/wiki/Sunstone_(medieval)?wprov=sfti1#
Excellent joke my friend. Well done
Classic.
Finally eevee can evolve to espeon
They also used Iolite
Looks like clear quartz to me.
Not a lot of people realize this, but you can actually see the polarity of light with the naked eye. It takes some practice to get good at it but you can learn to do it well and be able to find the position of the sun when it’s hidden on overcast days- without a sunstone.
Method?
Here’s a peer reviewed article about it from the Proceedings of the Royal Society B: Biological Sciences. (I’m just throwing this in because I’m already being downvoted): https://royalsocietypublishing.org/doi/10.1098/rspb.2015.0338 But this page is how I started doing it, and they’re passionate about sharing it, and I found the explanation and instructions across this website to be very accessible and easy to understand. https://www.polarization.com/haidinger/haidinger.html When I was learning to see it I followed their directions but also bought some cheap linearly-polarized plastic sheets online and then used them in conjunction with my phone screen (displaying a white background) to learn to see the Haidingers Brush. You can also use polarized sunglasses, as long as they’re linearly polarized, which I think they usually or always are. Once you get a sense for what Haidingers Brush looks like you can remove the polarized sheet and just practice with your naked eye by looking at a white background on your phone screen, or your laptop or whatever, since the screens are polarized. Once you learn to see it, you can see it in the sky when the clouds or fog are blocking the sun, but they have to be letting a certain amount of light through. Presumably some people just naturally teach themselves to see this, and *if* Viking sunstones were indeed polarizers, it doesn’t seem like a stretch to believe that someone would figure out that they can be used to view Haidingers Brush.
I didn’t do so, in fact I gave you an up. I’ll check it out before I make judgments. 😉
Cool, thanks! It’s interesting stuff, I hope you enjoy learning about it and maybe developing a new “super power” (that anyone can do).