Just as he starts posting content like this again, the masons will disappear him for revealing their secrets 😀

We all miss Dan's videos and Dan himself come back Dan

Don’t forget to pin it

Your parabolic mirrors are the best! Always thought we’d have 3d displays from them someday. If they’re coated with epoxy while spinning would it protect it?

@greenpowerscience Which do you like better for solar cooking: Fresnel (magnifying) lens or parabolic mirror?

Also do you think you can melt stuff with a telescope or a pair of binoculars like you do with a large fresnel lens?

Thank you so much for the awesome comment and for enjoying or videos!!!!!

Care to rephrase all that?

@@abundantharmony 1- take a ruler and draw 2 lines accros the edges of the circle. 2-find the middle of those 2 lines, take a square and draw those 2 lines Result- those 2 final lines will cross at the exact center of that specific circle. (Do it multipple time on the same circle starting with different lines to practice the technique) You can do it very precisely with a compass and a straight edge. This methode dosent require any measurements. It works best with large circles. You can also use rods and ropes with levels or lasers and geolocation measurment devices for even bigger scale (ex.middle of a city).

@@sk8pkl Bit difficult for curved surfaces, no? I don't see how a ruler would work at all. That is the whole point of the strings.

@@ddpxl indeed, a ruler or a string makes a perfect straight edge. The best marking tool for a curved surface would be what we call a chalk line... Wich is a string. Yes. You are right.

I have a design around this with cans.... kzfaq.info/get/bejne/fdd5lNN1sNraqpc.html

no need for paper and cutouts

"90 degree corner on edge of the circle" seems less precise tbh. Also it won't work on the parabolic mirror or any other "non-perfect" shape.

the definition of the speed square that he used to make the square to begin with... also the sheetrock Square however I'm assuming that the spirit of the challenge requires that you don't have those tools handy there is one other method which involves drawing two intersecting arcs whose centers are on a line that intersects the circle... the points where the two arcs intersect form a line perpendicular to the first line... so if both centers of the arcs fall on the perimeter of the circle then the line perfectly bisects the circle. use the line that you just created to find the perpendicular points that bisect the circle in the other direction

Or just put a drop of water on it

@@plur_ndbn and what if it isn't level?

@@russellborrego1689 Then geometrical center will not real center also

@@plur_ndbn exactly. If it's not perfectly level, then it's not the center.

@@russellborrego1689 and cardboard will not show center because it show geometrical center

Yes he come back to sleep again and with out denise which i care about

I know but, watch some other YT videos = 3 hour process 🤣

LOL.. Love your content Dan! You were the one that got me into solar power and Fresnel lenses back in the day. Looking forward to purchasing one of your lenses soon

Math is a rather generous term for whatever just happened in your head.

@@AtlasReburdened that would be 453 seconds.. for the empty void between your ears. DA

@@IMRROcom Lol, of course your glass ego forced you to deflect away from the subject of your bent pseudo-logic, which somehow equates the time necessary to teach something as precisely equal to the time it takes to do it. Got any other tricks, or is deflection and punching simple equations into a calculator the whole shebang?

The rest is a proof of concept

@@AtlasReburdened deflect WTF are you talking about pull the thing you are sucking on out your as. This is basic 5th grade math. You do not need 7 minutes for proof of concept. You must be on the short slow bus.