Planck time Definition and 27 Threads

Is the highest frequency possible the inverse of Planck time? Separate or connected question, what's the highest frequency achievable practically today?

If Planck length is 10^-35 of a meter and Planck time is 10^-43 of a second, doesn't that mean that as the relative speed gets closer to the speed of light and time acceleration and length contraction are happening, they are happening at a different rate, since length contraction has to reach...

Sean Carroll gives the Planck's set of four dimensioned quantities: Planck's mass, length, time and energy. I wanted to compare them with actual things.\begin{align} m_p=\sqrt{\frac{\hbar c}{G}}&=2.18\times{10}^{-8}\rm{kg}&\rm{{10}^{7}\ E. coli}\phantom {100000000000000000000}&\phantom...

I am well aware that spatial discreteness is in conflict with Lorentz-invariance. If there were a theory of QG that proposed Planck time as the smallest interval of physical time, would that be in conflict with Lorentz-invariance?

Mods, I wasn't sure whether to put this in quantum physics or relativity, but since the speed of light is the limiting factor I chose here. Move wherever you think is best. Okay so the speed of light is the asymptote for the speed that objects can accelerate to, and the Planck time is the...

I know that if an object moves at the speed of light, from its persepctive time will stop to a halt. However the smallest unit of time should be the plank time. So my question is, will the object (say a photon) experience throughout its life a single still "frame", or will it experience...

This thread is about a topic that unexpectedly came up in my thread titled "Contradiction between Cosmos and what someone here told me?". I will subsequently call that thread "Contradiction" for brevity. I am not sure if this thread belongs on the Quantum Physics forum or the chemistry forum...

When we throw an object vertically , its speed decreases due to gravity and comes to a halt at the very top, V=0 and starts falling down. What can we say about that "halt" moment? Is it defined in terms of seconds? Does it last as long as Planck time? being the smallest measurement of time that...

I was watching this PBS Spacetime video, and something they said bugged me. They said that some subatomic interactions are occurring at time scales less than the Planck Time. And thus, this would also mean that these things are happening at scales less than the Planck Length as well. My...

Amount of Planck energy is 1.956 * 10^9 J. Was this total energy of universe at plank time at big bang cosmology model? It's clear this amount of energy is not enough for making our solar system, even it's not enough for making mass of me ( 60 kg ). Should we postulate energy increase in the...

What do we know or speculate as to the size of the visible and entire universe between the Planck time and the beginning of explosive inflation?

Hi, So I am a little confused on the Planck scale. Correct me if I'm wrong (I hope this doesn't sound idiotic) but I believe that any field on a classical scale should be able to be quantized and work on a quantum scale/Planck scale, where the Planck length and the Planck time are the...

While Planck time is usually regarded as the shortest unit of time, isn't the shortest unit of time that can exist is the time it took to go from absolute time, the big bang, to everything after that i.e. local time? Did local time exist at the instant of the Big Bang?

Just curious. The Planck length is lpl = (hG/c3)1/2 = 10-33cm And it seems intuitive that it's c cube because space has three dimensions for the action. But the Planck time is tpl = (hG/c5)1/2 = 10-43s So is there some obvious physical reason why c is to the power of five here?

Hope someone can clear this up for me, is Planck time the shortest possible time in which a particle or quark or anything can perform some kind of action? Also is Planck length the shortest distance in which an object can actually move? Anything shorter than that and the object doesn't mean...

I've recently heard of Planck Time.. I read that it is the minimum time interval that can EXIST. What exactly changes in time intervals that are less than Planck time? And if I am not mistaken by the meaning of Planck Time; What is the reason that there is such a limit? For Example, the...

Is the universe similar to Conways game of life? Let me elaborate. For us, a second is the unit of time and its a pretty short unit of time. But then at the atomic scale, a second is a pretty big unit of time. Everything we do is in the order of seconds or maybe milliseconds. But so much happens...

Homework Statement Hi Guys, Just started a Mechanical Engineering Course and in my Physics this came up, I'm really confused and don't know were to start. I was wondering if anyone could shed any light on the subject. Thanks guys. Three of the fundamental constants of physics are the...

I was watching indepth on cspan booktv with Michio Kaku and he says that the Planck time has not be proven. I thought it was a proven fact, but he says it is still theoretical and we have no evidence for it yet. Is this true?

Quick question: Is Planck time the same in all reference frames? Is it different at, say, half the speed of light than at a relatively stationary point? What about in a severe gravitational field, like a black hole?

Deck of Cards and Planck Time? This is truly unbelievable. I've checked my work multiple times, gotten it checked by others, and still the same answer remains. There are more ways to rearrange a single deck of cards than there have been Planck times since the Universe began. Number of...

Homework Statement Find a set of 3 exponents a, b, g such that the quantity [G]^a [h]^b [c]^g has dimensions of time. In other words: [T] = [G]^a [h]^b [c]^g (hint: you should get 3 algebraic equations in the 3 unknowns a, b, g which are not that hard to solve. Now determine the socalled...

Can we synchronize n samplers so that the system is being sampled at 1/n Planck time? What could we tell about the data values between two adjacent samples?

A section in my textbook talks about Planck time, but I still don't quite get what does it mean after I finished reading it. I am also wondering whcih laws of physics can be applied to the Planck time. Some info that might be helpful for answering this question: tp=√(Gh/c^5) where G is the...

How does instantanious action at a distance reconcile itself with Planck Time and the assumption that nothing can happen in this minuscule timescale? Does the transition from cause to effect not have a Planck time after the cause and before the effect? Could one describe a unit of Planck Time...

Can someone explain what are they: For egs. What is Planck time, PLanck length, Planck particle etc.

O.k., so I'm reading this article by victor stenger called Fitting the Bible to the Data where he is criticizing this guy Schroeder's attempt to fit the bible creation story in with big bang cosmology. he chooses the time of quark confinement, or 10^-4 seconds to start. this is the part that...