Special Relativity: Crash Course Physics #42
Why Physics Stack Exchange recommends it
Physics Stack Exchange users link it as a friendly animated introduction to special relativity for newcomers confused about time dilation and what different observers see.
Recommended by 2 people across 2 different months, 2018 to 2023.
What it is
An 9-minute Crash Course Physics episode, hosted by Shini Somara, that introduces special relativity. It covers frames of reference, the constant speed of light, and why relativity feels so strange, using animations rather than heavy math.
What people said
Recommends Ben Crossley · 2018-06 · Physics Stack Exchange · on “Doubt on relativity”
Here is a link to Crash Course Physics episode 42 on Special relativity. This topic is mentioned with great animations. Hopefully it will help you think about the problem [this video]
Recommends Pancake_Senpai · 2018-10 · Physics Stack Exchange · on “A train passes an observer on a platform at half the speed of light. Who measures the proper time?”
This video ( [this video] ) shows the opposite (the actual example is about 3 minutes in). Also, my special relativity lecturer this morning derived the same thing as the video.
Cites user42493 · 2019-12 · Physics Stack Exchange · on “How do I see someone moving near speed of light?”
I have zero knowledge of physics, so sorry for the newb question. I was wondering, after watching this video [this video] , if I'm looking at a person travelling near the speed of light, would I see him not moving at all since his time slowed down drastically?
Cites SMK · 2023-08 · Physics Stack Exchange · on “The Lorentz factor $γ$, and Fermilabs derivation of it”
Before diving into my question, we first must acknowledge Einsteins two assumptions: The laws of physics are the same for every observer and reference frame. The speed of light is constant for different observers. Background I was trying to learn about the Lorentz Factor ( γ), and happened to come across Fermilabs [LINK] video on it. Here is one question which arose to me after brainstorming for several hours on it and looking at different sources, such as CrashCourse [this video] ; But I still do not get it when I compare with Fermilabs video. Question [LINK] The distance from the flashlight to the mirror will be denoted as W and c as the speed of light. The time it will take from the flashlight