@vasconcelos7356
This one was waaaay too obvious
@poke9763
He felt bad that he kept getting everyone so he gave this one for free 😌
@Omlet221
The sprinkle one got me because I’ve seen this done before with sand on top of a metal plate attached to a speaker driver. I think to get it to work you need a much lower frequency and without distortion.
@boredstudent9468
with a very prepared setup, you actually can do very similar effects like the sprinkels, but it doesnt make so distinct circles
@EDoyl
The first one is almost true (you need the troughs of the tray to be 1 inch apart, requires a higher frequency force and it's a much more complicated transverse 2D wave, 517Hz gives 1 inch wavelength in 1D longitudinal waves in air) but this show has given me flawless backwards-vision.
@wilhelmbetz3565
I knew as soon as i saw the first one it was reversed and im so proud ofmyself
@shawn-b2u
#1 this can actuially happen, but only in specific circumstances. That's how you can levitate objects with sound.
@randomidiotonline5072
1, I could tell cause it looked like you just shook them backwards lol
@flacacordero4626
I realize how petty I am with these videos. I like the ones where I'm right, and angrily swipe up on the ones that I am wrong
@lynxoflight72
straight up calculated the wave length
@doonutholes
I love these! They always make me think about if it is true or a lie. I don’t always get them right but it’s fun nonetheless. Great work and great idea(s)!
@sjenkins91812
If you put those sprinkls on a tray over a speaker you actually can play certain frequencies to form cool patterns. SCIENCE!!!
@EviMeuris
I really love these 2 truths and a trash videos, please keep making them, they are extremely interesting 👍👍👍
@Krokodil986
The first one could actually work if you make standing waves, but youd need to be very careful so that the two opposite waves only interact with each other along one axis only. So they would need to be reflected by only one of the 4 sides of the metal tray and absorbed by the other 3 sides. Also the wave emitter would need to be as wide as the tray itself in order to avoid pseudo-diffraction which would mess with the axis of interaction of the waves This is why it's much easier to use a string to make standing waves. Then if you pair this with a strobe light at a very particular frequency (compared with the driver frequency) you can make the illusion of the string floating and curving like a worm
@sb_dunk
My favorite thing about the first video is how it absolutely decimates the video compression. There's so much changing frame-to-frame that it just cannot handle it.
@whyumad444
Actually the first one can be true, I conducted a science experiment in 8th grade with a similar scenario. Instead of a toothbrush I used a speaker that was capable of playing lower and higher frequencies. Also added a plate on top and some sand, played the frequency and watched the sand shape into patterns
@SocksTheRaccoon_
The sprinkle one may be fake but there was a musician who did the same experiment with sand, a metal plate and a violin bow. It works
@The-Wof-Nerd
I KNEW IT. THERE'S NO WAY THEY FORMED INTO SUCH PERFECT CIRCLES.
@Spectrqlll
As someone who studies waves every other day, this was actually easy to notice the lie
@JaDroppingScience