Plank Time & Speed: Is Light C Plank Speed?

[brianhurren]

If plank time is the time it takes a photon to travel a plank length and speed is d/t or meters/second. then is the speed of light c plank speed? is the constant speed of light evidence of plank time?

 

[CompuChip]

Yep, I guess.

Note however, that the speed of light is a physical constant and in fact the meter is defined in terms of it. A unit like the Planck time and Plank length are also defined in terms of other fundamental constants, e.g. $t_\mathrm{P} = \ell_\mathrm{P} / c$ where $\ell_\mathrm{P} = \sqrt{\hbar G c^{-3}}$ is defined in terms of c and two other fundamental constants. So it's basically by construction, which I wouldn't call "evidence".

 

[Dale]

evidence of plank time?

What does that mean? Do you need evidence of ounces, or teaspoons? What does it mean to have evidence of a unit?

 

[roldor]

Meter is a definition, second is. (Teaspoons also). So it is better to set c as 1. And lp as 1.

Sincerely.

 

[PJC01]

I can say that while the concept of plank time and the speed of light are related, they are not interchangeable. Plank time is a theoretical concept in quantum mechanics, representing the smallest unit of time that can be measured. It is calculated by dividing the plank length by the speed of light. This does not mean that the speed of light is the same as plank speed. The speed of light, also known as c, is a fundamental constant in physics and is the maximum speed at which all matter and information can travel in the universe.

While the constant speed of light may be considered evidence of plank time in the sense that it is used in the calculation of plank time, it is not the only factor. The concept of plank time also takes into account other fundamental constants such as the gravitational constant and the Planck constant. Additionally, the speed of light is not the only factor that determines plank time, as it also depends on the reference frame and the observer's perspective.

In summary, while plank time and the speed of light are related, they are distinct concepts in physics. The speed of light is a fundamental constant that is used in the calculation of plank time, but it is not equivalent to plank speed.