Related: How is the curl of the electric field possible?
According to my information:
$$\nabla \times \frac{\hat{r}}{{|\mathbf{r}|}^2} = 0 $$
for all $\mathbf{r}$ ( including $\mathbf{r}=0$; compare with $\nabla \frac{\hat{r}}{{|\mathbf{r}|}^2} = 4 \pi \delta(|\mathbf{r}|)$ that is zero excep...
Is this explanation correct:
When a photon with the appropriate energy hits an atom, the electron will make a transition from the ground state to a excited state. This will make the potential energy of the atom higher. Also, momentum is conserved, and the velocity of the atom will change in the ...
I have an idea that the space elevator can be build in the following conditions:
Not a classic theory. No cable. No Geostatic orbit. Not equator platform position
The position is north magnetic pole - Antarctica.
The lifting force is Earth magnetic field.
The lift design is a huge ring (more th...
I have an idea that the space elevator can be build in the following conditions:
Not a classic theory. No cable. No Geostatic orbit. Not equator platform position
The position is north magnetic pole - Antarctica.
The lifting force is Earth magnetic field.
The lift design is a huge ring (more th...
Backup Room – The h Bar
Backup Room – The h Bar