from j4k3@lemmy.world to science@mander.xyz on 20 Jun 23:27
https://lemmy.world/post/31738594
www.youtube.com/watch?v=v75f530yFOY
> This crystal doubles images, meaning that if you look through it that anything on the other side whether that be text, a person, or a photo of a volcano will appear to be doubled. But, why does this unusual optical property occur when utilizing a crystal of calcite? The answer is a fascinating phenomenon known as birefringence, which this video will explain through the expertise and analysis of a geologist.
Found out about this website from today's Geology Hub uploaded on YT
This is the about-page of which text continues past the posted image on the left side:
www.mindat.org/a/aboutmindat
Here is the link to the discussion groups page pictured:
www.mindat.org/discuss.php
And as a further aside, the image was made with an F-Droid app that is new to me but popped up 3 months ago apparently and has a lot of great features for stitching images and creating content:
f-droid.org/…/ru.tech.imageresizershrinker github.com/T8RIN/ImageToolbox
threaded - newest
That’s awesome!
That’s rigjt up there with the ROCKD app.