Physics Archive

Curved Time Creates Gravity

David Johnson | March 11, 2025

Curved time creates gravity because of how time dilation affects the motion of objects. This is a key idea in Einstein’s General Theory of Relativity, where gravity is

Physics

Einstein’s Special Relativity

David Johnson | March 8, 2025

The Principle of Special Relativity Einstein’s Special Theory of Relativity, published in 1905, revolutionized our understanding of space and time. It is built on two fundamental postulates: the

Physics

How was the speed of light discovered?

David Johnson | August 21, 2023

The speed of light is one of the most fundamental constants in physics, but its discovery was not immediate. For much of history, philosophers and scientists debated whether

Physics

We all move at the Speed of Light

David Johnson | June 11, 2023

Can we exceed the speed of light? Does surpassing this velocity imply time travel? What makes this specific speed so significant?

Physics

Newton vs. Mach

David Johnson | August 21, 2022

The Bucket Experiment What is the true nature of motion? Both Newton and later Mach tested this but arrived to different conclusions. Who was right?

Physics

Einstein’s Big Idea

David Johnson | December 20, 2021

Albert Einstein came to the startling conclusion that mass and energy are one. This is the story behind his famous equation E = mc2. It started with Michael

Physics

The Bootstrap Paradox

David Johnson | August 16, 2021

The bootstrap paradox is a classic time travel problem that is used in many science fiction movies. Can a future event cause something to happen in the past,

Physics

Hawking Radiation

David Johnson | May 7, 2021

A brilliant visual and audio explanation of Hawking radiation and the paradoxes it brings to light. An interesting topic as there is a link between physics and quantum.

Physics

We all move at the same speed

David Johnson | March 13, 2021

If you speed up in space, then time slows down to compensate. If you are standing still, then time is travelling at 100% of its speed. No matter

Cosmos

Visualizing General Relativity

David Johnson | November 10, 2020

This is a better way to represent general relativity. It shows the curvature of time which other models do not. An easier to understand model to explain spacetime