Haitar

1 watt per second or 1 joule is = 10watts applied in 0,1 second ok

now you say:

1/1 = 1 but 10/0,1 = 100 and that cannot be the same obviously. however

1 Watt*second = 10Watt*0,1 second = 1 Joule

And you are not wrong

as it is not the same because i'm talking about energy density not the total energy inside of the system.

you need to understand that i'm talking about 0,1 second not 1 second anymore

1 joule witch is equal to 1 watt if discharged in one second... as much as is 10kw power applied in 1 second is = to 10kj and likely if this 10kj is applied in a shorter time the density of the energy is greater.

einstein proved this with the relativistic theory, and also plank

If you increase the frequency you increase the energy density, the energy bags become more dense... but overall energy is the same as on the rest of the second you will not apply more energy

you see the joules remain the same because watts * second but the density is watt/second

Thats what i mean

Now you just need to figure that this density will lead you to achieve effects on materials witch will lead them to generate electrical energy by movement or deflection of the charged particles due to the intensity of the field...