I never understood why light has momentum but no mass.. until now!
![](https://i.ytimg.com/vi/PdN1mweN2ds/mqdefault.jpg)
15:59
I never understood why electrons have spin... until now!
![](https://i.ytimg.com/vi/wiBsfvW5AWY/mqdefault.jpg)
21:58
I never understood why light has ENERGY but NO MASS... until now!
![](https://i.ytimg.com/vi/KIe258vq3o4/mqdefault.jpg)
23:48
Équation trigonométrique, Olympiade
![](https://i.ytimg.com/vi/XoVW7CRR5JY/mqdefault.jpg)
14:44
The Electromagnetic field, how Electric and Magnetic forces arise
![](https://i.ytimg.com/vi/EjZB81jCGj4/mqdefault.jpg)
22:59
Le paradoxe du dôme : une faille dans les lois de Newton
![](https://i.ytimg.com/vi/P_fHJIYENdI/mqdefault.jpg)
24:52
What if all the world's biggest problems have the same solution?
![](https://i.ytimg.com/vi/l2wnqlcOL9A/mqdefault.jpg)
16:20
The REAL Three Body Problem in Physics
![](https://i.ytimg.com/vi/M--6_0F62pQ/mqdefault.jpg)
32:50