Our Ignorance About Gravity

This video is about how little we know about the behavior of gravity at short length and distance scales, what the constraints are on the inverse square law/Newton's law of universal gravitation, at the human and microscopic and atomic scales. Only on solar system scales or larger do we have good constraints on Newton's law of gravitation.

REFERENCES

Review of short-range gravity experiments in the LHC era

Zeptonewton force sensing with nanospheres in an optical lattice

Large extra dimensions

Search for Screened Interactions Associated with Dark Energy Below the 100 μm Length Scale

Tests of the Gravitational Inverse-Square Law below the Dark-Energy Length Scale

Photon Mass Experiment

Torsion balance experiments: A low-energy frontier of particle physics
E.G. Adelberger, J.H. Gundlach, B.R. Heckel, S. Hoedl, S. Schlamminger

TESTS OF THE GRAVITATIONAL INVERSE-SQUARE LAW
E.G. Adelberger, B.R. Heckel, and A.E. Nelson

Physical Review A, Vol 33, No 1: Improved result for the accuracy of Coulomb's law: A review of the Williams, Faller, and Hill experiment.
Lewis P. Fulcher.

MinutePhysics is on twitter - @minutephysics

Minute Physics provides an energetic and entertaining view of old and new problems in physics -- all in a minute!

Created by Henry Reich

[oscarin]

"The Earth looks flat when..."


flat-earther: *say no more*

[fowlr]

Well this wouldn't be a problem if Isaac Newton didn't invent gravity

[NegativeAccelerate]

I wish we could just float around like we did before newton discovered gravity

[josephjackson]

5:00 be careful with that exclamation mark when dealing with a math problem

[EmetYAHU]

Now IF ONLY some Hipster could have plucked the Bass while I was learning Physics back in High School...   XD

[kennethmeisner]

still it seems to an excellent estimation by considering 1600's world

[johnfarris]

I've done many observations, and two sheep definitely attract.

[calmkat]

Minute Physics: "Hair is actually 2D"

Uh excuse you, my hair has VOLUME.

[duchi]

*According to Keeanu Reeves*
Gravity is the secret for staying down-to-Earth

[davidefacchini]

Me: *spends years and patience to understand physic laws

MinutePhysics: *ding dong what you knew is wrong*

[brendans]

ZeptoNewtons. So small you never even heard of it

[ethribin]

In other words:
Newtons law isnt wrong. Its imperfect, specialized, or misses factors that are ignorable in some cases but important in other cases.

But thats physics.

[nightlark]

you could say we don't really understand the gravity of the situation

[bencrossley]

Henry, the graph at 3:25 is wonderful. This aspect of science is so poorly understood and I think leads to a large amount of pseudoscience. Could you please make a video with several different concepts showing how certain we are about each concept. This shows the danger of extrapolation so clearly!
Excellent video as usual.
Thanks, Ben - a mathematician.

[harrishartman]

Scientist: How many dimension we need to discover you?
Gravity: Yes.

[NGC-]

Who knew you could make an epic depiction of a black hole with just a sharpie and some pencil crayon scribbles?

[Adam-jmun]

0:54 for all the Flat-Earth believers, he just cleared it up

[olliedylan]

*minute physics... 5 minute video*

*wait, that’s illegal*

[MacDaniboi]

I'm so strong I can lift the entire earth. *proceeds to do a handstand*

[drewbutler]

Me: Watching video, pretending to understand everything