[“Quantum foundations” series] A physicist walks into a bar, and asks the bartender, “What time is it?” The bartender is about to reply but then recognizes the customer. “You’re a physicist, correct? So, it’s a trick question.” So, what’s with time? A venerable philosophical question. A foundational question in physics. We have electronic devices, extremely… Continue reading Whence the arrow of time?
I studied thermodynamics as an undergrad. Online resources really help refresh my understanding; so, here’s a summary of my notes about entropy. Hopefully these agree with how the term is used in physics. Statements Equation: S = k ln Ω [Wiki] “The second law of thermodynamics states that an isolated system’s entropy never decreases. Such… Continue reading More about entropy — reality vibrates
When I started reading some of the latest books by well-known physicists, I realized that there were some foundational concepts and terminology that I needed to revisit and review. Thanks, Wikipedia (to which I have indeed donated money). So, I’m not talking about Einstein’s famous E = mc^2. No, something more basic: energy and entropy.… Continue reading Starting with ‘e’ it’s a mystery