How do lasers measure distance?? Well there's 3 ways, but one of them is the best (in my opinion).
Previous Video on Velocity:
https://www.youtube.com/watch?v=NL2_vVnqUSw
0:00 - Introduction
1:39 - Reinventing the wheel
4:56 - The magic trick
10:59 - How to change a lasers frequency
16:21 - Conclusion
