Quantum Eraser

The Quantum Mystery of Wigner's Friend

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♦ Please note this Insight is currently being edited. Please…
Calculus Therom

A Numerical Insight for the Fundamental Theorem of Calculus

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The purpose of this article is not to provide some rigorous statement,…
inventions

Inventions and Inventors Quiz

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Time to test your inventions, inventors and patent knowledge.…
Super Quantum

The Unreasonable Effectiveness of the Popescu-Rohrlich Correlations

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In this Insight, I will show how the Popescu-Rohrlich (superquantum)…
engineer anorlunda

Interview with Engineer Mentor anorlunda

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

Interview with Physics Mentor bhobba

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

An Example of Servo-Constraints in Mechanics

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

Guide to Buying Your First Telescope

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We often have questions about what telescope an aspiring amateur…
physicsblogs

What Are Your Favorite Science or Math Blogs?

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

A Simplified Synthesis of Financial Options Pricing

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

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 quantum

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…
whosaidwhat

Match the Scientist with the Story

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

The 10 Commandments of Index Expressions and Tensor Calculus

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

Direct Echo-Based Measurement of the Speed of Sound

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

A New Interpretation of Dr. Walter Lewin's Paradox

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Much has lately been said regarding this paradox which first…
information definition

How to Better Define Information in Physics

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When I ask questions about conservation of information I frequently…
Sagittarius_A

Calculating the Spin of Black Hole Sagittarius A*

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This Insight takes a look at how it is possible to calculate…
Niels_Tuning2

Interview with Niels Tuning, LHCb Run Coordinator

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

What Academic Advice Would You Tell Your 18 Year Old Self?

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We asked our PF Advisors to tell us what academic advice would…
algorithms

Intro to Algorithms for Programming

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

Solving Einstein's Field Equations in Maxima

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

What's Your Most Memorable Textbook?

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

Lessons From the Bizzaro Universe

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The terms Bizarro and Bizarro World originated in Superman comics,…
ridler_motion2

Rindler Motion in Special Relativity: Rindler Coordinates

27 Comments
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Our destination In our last article, Hyperbolic Trajectories,…
sun_getting_smaller

Either the Sun Is Getting Smaller or Gravity Is Getting Weaker

30 Comments
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Paper discussion: Solar system expansion and strong equivalence…
ridler_motion

Rindler Motion in Special Relativity: Hyperbolic Trajectories

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

Interview with Astrophysicist Adam Becker

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Adam Becker is an astrophysicist and science writer whose first…
statmech2

Statistical Mechanics: The Ideal Gas

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

"Classical Physics Is Wrong" Fallacy

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One of the common questions or comments we get on PF is the claim…
hilbertspaces2

Hilbert Spaces And Their Relatives: Operators

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  Operators. The Maze Of Definitions. We will use…
cliffordjohnson

Interview with Theoretical Physicist Clifford V. Johnson

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

Hilbert Spaces and Their Relatives: Basics

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  Basics Language first: There is no such thing as…
qft_renormalization

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…
qft_freequantum

Mathematical Quantum Field Theory - Free Quantum Fields

1 Comments
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This is one chapter in a series on Mathematical Quantum Field…
bb_infinity2

Intro to Big Bang and Infinity Concepts

33 Comments
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This article is part of our student writer series. The writer…
drak

Interview with a Mentor: Drakkith

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 Give us an early bio on yourselfWell, I was born…
journeycosmos3

A Journey Into the Cosmos - FLRW Metric and The Friedmann Equation

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This article is part of our student writer series. The writer…
qm_interpretations

The Fundamental Difference in Interpretations of Quantum Mechanics

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

Mathematical Quantum Field Theory - Quantization

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