what is faster than the speed of light

Introduction

The speed of light in a vacuum is a fundamental constant of nature, precisely measured to be approximately 299,792,458 meters per second. This speed is often considered the ultimate speed limit in the universe, according to the principles of relativity. The question of whether anything can travel faster than the speed of light has been a topic of much debate and research.

Key Insights

Confirmed Speed of Light: The speed of light has been precisely measured and confirmed to be 299,792,458 meters per second through independent measurements of wavelength and frequency.
No Experimental Evidence for Faster-than-Light Travel: There is no experimental evidence to support the existence of any object or phenomenon that travels faster than the speed of light. Claims suggesting otherwise are considered arbitrary and lack empirical support.

Conclusion

The current scientific consensus, based on precise measurements and lack of contrary evidence, is that nothing travels faster than the speed of light. Any claims of faster-than-light travel remain speculative and unsupported by experimental data.

What is faster than the speed of light

Summary

Introduction

Key Insights

Conclusion

Sources and full results

Confirmation of the currently accepted value 299 792 458 metres per second for the speed of light

The speed of light is 299 792 458.1 m/s, as determined by independent measurements of wavelength and frequency of the CH4-stabilized He-Ne laser.

Faster than Light Speed as Arbitrary

No experiment has proven that light travels at a faster rate than 299,792,458 meters per second, so any hypothesis claiming objects ejecting material in outer space at faster rates are arbitrary and ad hoc.

The Speed of Light

The speed of light is the same in all frames, indicating that it serves as a limit and that Galilean velocity addition fails to describe nature at high speeds.

Measurement of the speed of light

The speed of light has been determined using a CO2 laser, enabling a precise measurement of the speed of light at 9.3 m.

New varying speed of light theories

A varying speed of light (VSL) theory may solve cosmological problems and explain the WMAP data, but current evidence is slim.

Faster than Light

Superluminal motion in jets of fast subatomic particles from black holes can be seen in distant galaxies, suggesting a connection between acceleration and high-energy emission flares.

A limit on the variation of the speed of light arising from quantum gravity effects

No evidence for violation of Lorentz invariance in the detection of emission up to 31 GeV from GRB 090510, disfavoring quantum-gravity theories.

Particle velocities faster than the speed of light

Clocks and rods moving faster than the speed of light may experience time contraction and Lorentz expansion, respectively, in agreement with earlier articles on the subject.

Speed of Light From Direct Frequency and Wavelength Measurements

The Boulder group's new method for measuring the speed of light using a helium-neon laser stabilized against methane's transition significantly improved the accuracy of the measurement.

The Speed of Light

Galileo observed that light travels at least ten times faster than sound, suggesting it travels at least ten times faster than sound.

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