### Interview with Engineer Mentor anorlunda

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Tell us about your school years? Part of my story is sad but…

### Interview with Physics Mentor bhobba

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Give us an executive summary on bhobbaI was born in Toowong…

### An Example of Servo-Constraints in Mechanics

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Servo-constraint was invented by Henri Beghin in his PhD thesis…

### Guide to Buying Your First Telescope

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We often have questions about what telescope an aspiring amateur…

### What Are Your Favorite Science or Math Blogs?

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We asked our PF Advisors to tell us what their favorite science…

### A Simplified Synthesis of Financial Options Pricing

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Financial options (the right to purchase ("call") or sell ("put")…

### Orbital Mechanics in Unity Game Engine for Augmented Reality

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In this post I’ll go over implementing basic orbital mechanics…

### Why the Quantum | A Response to Wheeler's 1986 Paper

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Wheeler's opening statement in his 1986 paper, How Come the…

### Match the Scientist with the Story

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Among the most famous people are often geniuses. It's hard to…

### The 10 Commandments of Index Expressions and Tensor Calculus

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Having more than 10 years of experience in teaching vector and…

### Direct Echo-Based Measurement of the Speed of Sound

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Figure 1: Distance vs. time a firecracker report echoed off…

### A New Interpretation of Dr. Walter Lewin's Paradox

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Much has lately been said regarding this paradox which first…

### How to Better Define Information in Physics

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When I ask questions about conservation of information I frequently…

### Calculating the Spin of Black Hole Sagittarius A*

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This Insight takes a look at how it is possible to calculate…

### Interview with Niels Tuning, LHCb Run Coordinator

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Physics Forums is pleased to introduce Niels Tuning. He's a…

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### Intro to Algorithms for Programming

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Many threads here at PF include some question about how to learn…

### Solving Einstein's Field Equations in Maxima

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A few months ago, pervect pointed me to a post by Chris Hillman…

### What's Your Most Memorable Textbook?

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We asked our PF Advisors to tell us their most memorable or influential…

### Lessons From the Bizzaro Universe

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The terms Bizarro and Bizarro World originated in Superman comics,…

### Rindler Motion in Special Relativity: Rindler Coordinates

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Our destination In our last article, Hyperbolic Trajectories,…

### Either the Sun Is Getting Smaller or Gravity Is Getting Weaker

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Paper discussion: Solar system expansion and strong equivalence…

### Rindler Motion in Special Relativity: Hyperbolic Trajectories

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Introduction: Why Rindler Motion? When students learn relativity,…

### Interview with Astrophysicist Adam Becker

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Adam Becker is an astrophysicist and science writer whose first…

### Statistical Mechanics: The Ideal Gas

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Read Part 1: Equilibrium Systems The Ideal Gas: Boltzmann's…

### "Classical Physics Is Wrong" Fallacy

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One of the common questions or comments we get on PF is the claim…

### Hilbert Spaces And Their Relatives: Operators

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Operators. The Maze Of Definitions. We will use…

### Interview with Theoretical Physicist Clifford V. Johnson

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Clifford V. Johnson is a professor in the Physics and Astronomy…

### Hilbert Spaces and Their Relatives: Basics

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Basics Language first: There is no such thing as…

### Mathematical Quantum Field Theory - Renormalization

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This is one chapter in a series on Mathematical Quantum Field…

### Name the Science Book Author Quiz

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Let's see how well you know your science book authors. Some are…

### Mathematical Quantum Field Theory - Interacting Quantum Fields

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This is one chapter in a series on Mathematical Quantum Field…

### Mathematical Quantum Field Theory - Free Quantum Fields

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This is one chapter in a series on Mathematical Quantum Field…

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### Interview with a Mentor: Drakkith

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Give us an early bio on yourselfWell, I was born…

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### The Fundamental Difference in Interpretations of Quantum Mechanics

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A topic that continually comes up in discussions of quantum mechanics…

### Mathematical Quantum Field Theory - Quantization

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The following is one chapter in a series on Mathematical Quantum…

### Statistical Mechanics: Equilibrium Systems

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This is the first of a multi-part series of articles intended…