Author Archives: Sung Lee

Mythbusting Tachyons

Posted on January 28, 2023 by Sung Lee

There appear to be some misunderstandings concerning superluminal motions or tachyons (here we mean them by generic hypothetical superluminal particles) in physics literature including textbooks. For example, a claim that superluminal motions violate special relativity, that tachyons have an imaginary … Continue reading →

Posted in Special Relativity | Leave a comment

Are Tachyons Really Faster-Than-Light?

Posted on December 17, 2022 by Sung Lee

I will be more than happy to be corrected if I am wrong, but, as far as I am aware, there is no confirmed FTL (Faster-Than-Light) phenomenon. In the past, there were some reported FTL phenomena with the speed of … Continue reading →

Posted in Special Relativity | Leave a comment

The First Image of a Supermassive Black Hole at the Heart of Milky Way Galaxy

Posted on May 16, 2022 by Sung Lee

The first image of a supermassive black hole was obtained back in 2019 by the Event Horizon Telescope (ETH) Collaboration. The supermassive black hole, called M87*, is located at the center of  a distant galaxy Messier 87. It is about … Continue reading →

Posted in Astronomy, Astrophysics, General Relativity | Leave a comment

Are Real Numbers Real?

Posted on September 26, 2021 by Sung Lee

Undoubtedly, real numbers are the most fundamental things to describe literally everything we know about our physical world, so questioning if real numbers are real may appear to be as silly as questioning if our world is real. But seriously, … Continue reading →

Posted in Foundations of Mathematics | Leave a comment

Can $1+1$ be $1$?

Posted on June 28, 2021 by Sung Lee

$1+1=2$ is often quoted by laypeople (in mathematics) as an epitome of the absolute truth. Those who know a bit of mathematics know that that is not the case. For example, there is a number system where $1+1=0$. It is … Continue reading →

Posted in Foundations of Mathematics | Leave a comment