SIMULATING THE ARROW OF TIME

▸ Loading the microscopic laws (time-symmetric, T)…
▸ Building the time axis past → future
▸ Installing the "arrows": thermodynamic · cosmological · radiative · psychological
▸ Setting the initial condition: an EXTREMELY LOW-entropy Big Bang (Past Hypothesis)
▸ ⚠ Note: WHY time has a direction is still an OPEN QUESTION
▸ Ready — Online. ✅
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⌂ Frontiers of knowledge

Simulation room Arrow of time

Arrow of Time — why does time have a direction?
Online
T-symmetry · entropy · UNSETTLED
Entropy gauge
⏳ S chỉ TĂNG (định luật 2)
Arrow in focus—
Time direction—
Entropy (illustrative)—
Cosmic expansion—
Question status—
Viewing—
The honest boundary
The microscopic laws are nearly time-symmetric (T-symmetry) — so why does macroscopic time have a clear DIRECTION? Most reduces to the Past Hypothesis (an extremely low-entropy Big Bang). But why the past was low is NOT fully explained — this is an OPEN question.
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Pick a "Scenario" (microscopically reversible / thermodynamic / cosmological / Past Hypothesis / open question) · click Reverse on the micro scene (still valid) & thermo (looks WRONG) · click a concept to see "known / open"
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Entropy over time — rising one way only entropy Stime direction
About Arrow of Time

Arrow of Time is one of 20 topics in the Frontiers of Knowledge domain (? chưa giải scale) at My Labs — an interactive simulation atlas. This virtual lab runs right in your browser: adjust the parameters, pick a scenario and watch the phenomenon change in real time, with a click-to-inspect cross-section for every structure.

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