Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Space-Time Curvature and the General Theory of Relativity01:17

Space-Time Curvature and the General Theory of Relativity

4.0K
In 1905, Albert Einstein published his special theory of relativity. According to this theory, no matter in the universe can attain a speed greater than the speed of light in a vacuum, which thus serves as the speed limit of the universe.
This has been verified in many experiments. However, space and time are no longer absolute. Two observers moving relative to one another do not agree on the length of objects or the passage of time. The mechanics of objects based on Newton's laws of...
4.0K
Gauss's Law: Planar Symmetry01:27

Gauss's Law: Planar Symmetry

9.2K
A planar symmetry of charge density is obtained when charges are uniformly spread over a large flat surface. In planar symmetry, all points in a plane parallel to the plane of charge are identical with respect to the charges. Suppose the plane of the charge distribution is the xy-plane, and the electric field at a space point P with coordinates (x, y, z) is to be determined. Since the charge density is the same at all (x, y) - coordinates in the z = 0 plane, by symmetry, the electric field at P...
9.2K
Inertial Frames of Reference01:03

Inertial Frames of Reference

8.5K
Newton’s first law is usually considered to be a statement about reference frames. It provides a method for identifying a special type of reference frame: the inertial reference frame. In principle, we can make the net force on a body zero. If its velocity relative to a given frame is constant, then that frame is said to be inertial. So, by definition, an inertial reference frame is a reference frame where Newton's first law holds valid. Newton's first law applies to objects with...
8.5K
Imaging Biological Samples with Optical Microscopy01:18

Imaging Biological Samples with Optical Microscopy

8.7K
Optical microscopy uses optic principles to provide detailed images of samples. Antonie van Leeuwenhoek designed the first compound optical microscope in the 17th century to visualize blood cells, bacteria, and yeast cells. In 1830, Joseph Jackson Lister created an essentially modern light microscope. The 20th century saw the development of microscopes with enhanced magnification and resolution.
In optical microscopy, the specimen to be viewed is placed on a glass slide and clipped on the stage...
8.7K
Gauss's Law: Spherical Symmetry01:26

Gauss's Law: Spherical Symmetry

8.9K
A charge distribution has spherical symmetry if the density of charge depends only on the distance from a point in space and not on the direction. In other words, if the system is rotated, it doesn't look different. For instance, if a sphere of radius R is uniformly charged with charge density ρ0, then the distribution has spherical symmetry. On the other hand, if a sphere of radius R is charged so that the top half of the sphere has a uniform charge density ρ1 and the bottom half has a...
8.9K
Gauss's Law: Cylindrical Symmetry01:20

Gauss's Law: Cylindrical Symmetry

9.2K
A charge distribution has cylindrical symmetry if the charge density depends only upon the distance from the axis of the cylinder and does not vary along the axis or with the direction about the axis. In other words, if a system varies if it is rotated around the axis or shifted along the axis, it does not have cylindrical symmetry. In real systems, we do not have infinite cylinders; however, if the cylindrical object is considerably longer than the radius from it that we are interested in,...
9.2K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

An anti-PMEL antibody-drug conjugate with a G<sub>q/1</sub><sub>1</sub> inhibitor payload in GNAQ/GNA11-mutant melanomas: a phase 1 trial.

Nature medicine·2026
Same author

Impact of feature engineering on predicting non-contact football injuries.

Scientific reports·2026
Same author

Safety and outcome of transscleral fine-needle aspiration biopsy in uveal melanoma: 10-year experience in 347 cases.

Retina (Philadelphia, Pa.)·2026
Same author

10 Gbps free-space laser communication link for ranging: phase measurement sensitivity through turbulent atmosphere.

Optics express·2026
Same author

Circulating Tumor DNA Monitoring in Patients with Uveal Melanoma Using Mutation-Agnostic Multiplex Drop-Off ddPCR Assays.

Analytical chemistry·2026
Same author

Prevalence of the Predisposing Gene MBD4 for Uveal Melanoma.

JAMA ophthalmology·2026

Related Experiment Video

Updated: Jan 1, 2026

Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures
08:01

Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures

Published on: November 21, 2019

7.6K

New Test of Lorentz Invariance Using the MICROSCOPE Space Mission.

Hélène Pihan-le Bars1, Christine Guerlin1,2, Aurélien Hees1

  • 1SYRTE, Observatoire de Paris, Université PSL, CNRS, Sorbonne Université, LNE, 75014 Paris, France.

Physical Review Letters
|December 24, 2019
PubMed
Summary

The MICROSCOPE mission found no evidence of Lorentz violation in gravity couplings, setting new, stronger constraints on Standard Model Extension (SME) coefficients for matter-gravity interactions.

More Related Videos

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry
12:14

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry

Published on: August 12, 2013

22.4K
Author Spotlight: Universal Molecular Retention with 11-Fold Expansion Microscopy
10:31

Author Spotlight: Universal Molecular Retention with 11-Fold Expansion Microscopy

Published on: October 6, 2023

8.6K

Related Experiment Videos

Last Updated: Jan 1, 2026

Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures
08:01

Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures

Published on: November 21, 2019

7.6K
The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry
12:14

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry

Published on: August 12, 2013

22.4K
Author Spotlight: Universal Molecular Retention with 11-Fold Expansion Microscopy
10:31

Author Spotlight: Universal Molecular Retention with 11-Fold Expansion Microscopy

Published on: October 6, 2023

8.6K

Area of Science:

  • Fundamental Physics
  • Gravitational Physics
  • Cosmology

Background:

  • Tests of the universality of free fall probe fundamental physics principles.
  • The Standard Model Extension (SME) provides a framework for describing potential violations of Lorentz symmetry.
  • Lorentz violation in matter-gravity couplings could manifest as differential acceleration of test bodies.

Purpose of the Study:

  • To search for Lorentz violation in matter-gravity couplings using data from the MICROSCOPE space mission.
  • To set new constraints on specific Lorentz-violating Standard Model Extension (SME) coefficients.
  • To improve upon existing experimental limits for these coefficients.

Main Methods:

  • Analysis of data from five measurement sessions of the MICROSCOPE space mission, spanning one year.
  • Utilizing the T-SAGE instrument to search for a specific signature of Lorentz violation dependent on Earth's orbital velocity and rotation.
  • Applying statistical methods to constrain linear combinations of SME coefficients.

Main Results:

  • No evidence for a signature of Lorentz violation in matter-gravity couplings was detected.
  • New, stringent constraints were placed on linear combinations of SME coefficients, improving previous results by 1-2 orders of magnitude.
  • Independent linear combinations of coefficients were derived, enhancing the diversity of available experimental constraints.

Conclusions:

  • The MICROSCOPE experiment provides the tightest constraints to date on certain Lorentz-violating matter-gravity couplings.
  • The results contribute to the ongoing effort to test fundamental symmetries of nature.
  • The improved and diverse set of constraints pave the way for future decorrelation of individual SME coefficients.