Quantum / Physical foundations / Topic collection
Measurement and physical limits.
Control over intelligence. Computational models of reality.
Evidence, assumptions and consequences.
6 articles
Quantum / Visual analysis
Black-hole density depends on mass
Schwarzschild mean density falls as black-hole mass rises. It is not a universal threshold, and cosmological models describe a different system with different assumptions.
Quantum / Visual analysis
Measurement standards, calibration and uncertainty
Shared standards and traceable calibration make measurements comparable and their limits inspectable. The Planck length is a scale, not a demonstrated ruler mark.
Quantum / Visual analysis
Physical limits and quantum uncertainty
Physical principles, engineering constraints and quantum uncertainty impose different bounds. A minimum-uncertainty model shows what its assumptions do and do not establish.
Quantum / Visual analysis
Quantum eraser: conditional interference
Selected coincidence records reveal interference while the complete detection distribution remains unchanged. The explanation separates path information from measurement order.
Quantum / Visual analysis
The speed of light: a limit on influence
The invariant speed imposes a finite delay on communication and causation. Apparent exceptions describe medium, geometry or measurement rather than a signal exceeding c.
Quantum / Visual analysis
Wi-Fi throughput: shared airtime and bottlenecks
Channel access, interference, backhaul and demand constrain Wi-Fi throughput. Device count alone is insufficient.