Light Propulsion of Graphene Material
SebastianG
Posts: 184
Researchers created a sponge of graphene material which can be pushed with an external laser:
Paper:
http://arxiv.org/ftp/arxiv/papers/1505/1505.04254.pdf
Video demonstration:
Apparently electrons are emitted by the material while it is focused by a laser beam.
But I'm asking myself some questions:
1. Is the graphene losing electrons?
2. Would this destroy the graphene material after some time?
Could this be a meaningful propulsion method for space ships, what do you think?
Paper:
http://arxiv.org/ftp/arxiv/papers/1505/1505.04254.pdf
Video demonstration:
Apparently electrons are emitted by the material while it is focused by a laser beam.
But I'm asking myself some questions:
1. Is the graphene losing electrons?
2. Would this destroy the graphene material after some time?
Could this be a meaningful propulsion method for space ships, what do you think?
Comments
It is known that X-rays are caused by electrons striking a certain material, which then emits the rays. Reciprocally, if light strikes a (opposite sort of) material, then it should emit electrons.
Dark objects simply convert more energy at various frequencies in to heat "movement of atoms" or emit as infrared radiation.
The same process generate movement in em-drive.
When the power of the generated force is determined from the syncronisation wavelength to the material structure .To direct movement of atoms in one direction.
In theory on this principle could be built a transport beam
https://en.wikipedia.org/wiki/Crookes_radiometer
I think the propulsion of the graphene is working differently.
The light mill can't move with only the radiation pressure, because the friction is too high (If it would only need radiation pressure, it would work in a vacuum).
For me it looks like the force on the graphene is much higher than the force from the radiation pressure. As I understood that is because the electrons are shooting out of the graphene, but I'm not sure?
Here is an article which mentions the possibilty of a spacecraft propulsion:
https://www.newscientist.com/article/mg ... -sunlight/
Have you see the movie "First Men in the Moon" (1964)?
http://www.imdb.com/title/tt0058100/
They used a material which shielded the gravitational pull of earth to move their spacecraft. The material was painted on shutters so they could controll the direction of the shielding/movement.
Maybe they could use the graphene in a similar way
Personally, I am an advocate of the theory that gravity acts from outside and pushes objects to each other, so a spaceship would be shielded from "above".
Probably strong electric field could shield gravity
Only fast rotating mass for certain influence gravity, probably because of eather drag.
If the graphene is also losing material, it would be just like an ion drive.
Yes, I also think that you would have to shield gravity above