The Theory That Says We DON'T Need Dark Matter

We take Newton's laws of gravity for granted. Surely the inverse square law is the most accurately tested law in physics, right? WRONG. Ironically, gravity has been tested more accurately in the cosmos, than in the laboratory. Today we discuss a fascinating lab experiment putting the inverse square law to the test!

References:
"A torsion-balance search for ultra low-mass bosonic dark matter"

"Experimental progress towards testing the behavior of gravity at the 20-micron distance scale," M.P. Ross, J.S. Johnson, I.S. Guerrero, N. K. Dunkley, H.F. Leopardi, C.D. Hoyle, Journal of Undergraduate Research and Scholarly Excellence Pp. 1 – 7 (2018)

"Novel Tests of Gravity Below Fifty Microns," Jeremy S. Johnson, Noah K. Dunkley, Gabriela D. Martinez, Anthony E. Sanchez, and C.D. Hoyle (Faculty Advisor), Proceedings of the National Conference on Undergraduate Research (NCUR), 463 – 471 (2017)

Inverse square law:

Galaxy rotation curve:

My other gravity videos:
No Dark Matter. On MOND with Mordechai Milgrom

Barry Barish; Black Holes, Nobel Prizes, & the Imposter Syndrome

Join this channel to get access to perks:

📺 Watch my most popular videos:📺

Follow me to ask questions of my guests:

Script and slide help from Alyssa Johnson

-~-~~-~~~-~~-~-
Please watch: "Neil DeGrasse Tyson: Plays the Race Card!"
-~-~~-~~~-~~-~-
Join this channel to get access to perks:

📚 Get a copy of my books:

📺 Watch my most popular videos:📺

Follow me to ask questions of my guests:

#universe #podcast #briankeating #intotheimpossible #science #astronomy #cosmology #cosmicmicrowavebackground #intotheimpossible #briankeating

[Milan_Openfeint]

I have to point out that the title doesn't quite reflect the content of the video. That is a dangerous path.

[Killer_Kovacs]

How do they separate out the casimir effect from the results?

[johnkeck]

Very good, Brian! It's great to get an experimentalist's view of what's going on.

I wonder though why they need an *active* system to compensate. Sounds kind of "brute force." What about their setup prevents their using a passive system? Or is there a passive system that's just insufficient that we're just not hearing about? (Maybe making the different legs of the same or complementary materials, or such.) I wouldn't mind hearing you or someone geek out on the passive system and how it natural compensates for some class of systematic variation.

[tayzonday]

Is gravity even a force? It’s just the incidental behavior of subatomic particles seeking their lowest energy state which is the longest relativistic geodesic path.

[AquarianSoulTimeTraveler]

If you over control and go into oscillations that you know exactly how much your system is going to oscillate in over control mode then you might be able to create other different systems where you can calculate the over control oscillations and eliminate them from the equation and end up with nothing but the true signal.

[eljcd]

AI generated comments apart, the video is interesting but, sadly, the only good place to make definitive test of gravitation is millionsof km. away. Remember, a0, MOND acceleration parameter, has a value of 10 to -10 m2.

[pawnrook]

I forgot I am not supposed to care about this topic anymore. Good luck with discovery, guys! Everyone will steal it if you don't play their game.

[JungleJargon]

On smaller scales, there are probably many things that can interfere with the measurements, in my experience.

[nunomaroco]

Hi, super interesting, great experiment good luck.

[caliguevara]

So the pendulum a different geometry to measure force, instead of acceleration and deceleration it is rotation

[joshua]

7:26-"I have not failed 10, 000 times. I have successfully found 10, 000 ways that will not work, "

[seekwithin]

Could they test it by oscillating up & down instead of twisting it? Would that cause a different effects? You know the push pull.

[osue]

Thank you, R. Keating. I am slightly less confused.

[TessaTickle]

OMG, a reference to Father Ted ! I love you!

[blijebij]

I have a feeling this book won’t be closed anytime soon 😉

[markwrede]

We need better math. Owing to the uniformity of particles, multiplication remains effective, its periodic subset within the vastness of infinity may cause locality to become more dominant than is supposed.

[carlyet]

3:27 You get the Fundamental theorem of Calculus wrong - so what follows is questionable.
Re-metricate M, S, T as densities and ... the infinity evaporates. SpaceTime is Mass. as E/M = c^2
M/E = 1/(c^2) == e_*u_ etc.

[tonynagy]

This is amazing to me. I found myself caught in this loop once playing around in trying to fine tune mechanical automation valves to regulate output temperatures. Sometimes you just want to turn automation into a personal game when nobody's looking. 🤫😂.

[letsif]

I'm not a physicist, rather an enthusiastic layperson, so my comment may be naive, but everything vibrates. If nothing is static as I presently believe, the whole universe is perpetually in flux. Thus, even if the experiment where conducted in the vacuum of space, how would you seperate out the disturbance even in that environment?

[threeMetreJim]

The paper is about searching for dark matter, yet I never heard dark matter mentioned in the video, just that the inverse square rule for gravity might be incorrect. Maybe the curve is just like the black-body radiation curve and most measurements fall on the rising part. Also, dense materials take up more space than less dense materials do.