Could a pure-electric laser-propelled space rocket be mere decades away?

In summary, the conversation discusses the possibility of a "pure-electric" laser-propelled space rocket in the near future. However, this technology is dependent on the development of high-density energy storage, which is currently not practical. The idea has been considered, but solar-sails are seen as a more viable option. The energy storage would need to be at least nuclear in order for the rocket to be effective. The conversation also mentions the potential benefits of this technology, such as chemical-free refueling and the ability to transport "light-fuel" at the speed of light. However, the power density required for this technology is currently beyond the capabilities of current lasers and flashlights.
  • #1
kmarinas86
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1
Could a "pure-electric" laser-propelled space rocket be mere decades away?

I know that there probably isn't a battery capable of making this practical yet, but if it were possible to store energy at a high enough density, wouldn't that make it theoretically possible to make a rocket that uses lasers powered by on-board batteries to accelerate a spaceship? I think in 20 or so years it's plausible that technology might get advanced enough for that.

Has this idea been entertained much, or are solar-sails seen as more practical? How dense would the energy storage have to be? I would assume that energy per mass densities much higher than chemical rockets would be necessary (unless if in the future this system means that there is a vast decrease of complexity of other systems involved in the regulation of the power plant). I think that ultimately it may prove superior. Imagine a spaceship that you could recharge with chemical-free refueling. The "light-fuel" could be transported at the speed of light, which you could not say for the fuel of a fusion rocket or an anti-matter rocket.

"Light-fuel" could even come in any color you wanted.
 
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  • #2


Theoretically it would be possible, but the power density needed is DENSE. It would have to be at least nuclear if you want to get anywhere, and the laser (or even a flashlight) would have to be stupidly powerful, probably beyond all the flashlights and lasers currently on Earth put together. Force from light is extremely low.

Nevertheless, theoretically it's doable.
 

1. How does a pure-electric laser-propelled space rocket work?

A pure-electric laser-propelled space rocket works by using a laser beam to generate energy, which is then converted into electricity. This electricity is used to power an electric thruster, which propels the rocket forward. The laser beam also provides a constant source of energy, allowing the rocket to travel for longer periods of time.

2. What are the advantages of a pure-electric laser-propelled space rocket compared to traditional rocket propulsion methods?

One major advantage of a pure-electric laser-propelled space rocket is that it is much more efficient and environmentally friendly. It does not require any chemical propellants, which reduces the risk of explosions and eliminates the need for refueling. It also produces less pollution and is quieter than traditional rockets.

3. How far can a pure-electric laser-propelled space rocket travel?

The distance a pure-electric laser-propelled space rocket can travel depends on various factors such as the power of the laser, the efficiency of the electric thruster, and the weight of the rocket. However, with advancements in technology, it is possible for these rockets to travel to distant planets and even beyond our solar system.

4. What are the challenges in developing a pure-electric laser-propelled space rocket?

One of the main challenges in developing this type of rocket is finding a way to generate and harness enough energy to power the electric thruster. Another challenge is designing a system that can withstand the intense heat and radiation from the laser beam. Additionally, there may be logistical challenges in setting up and maintaining the necessary infrastructure for launching and operating these rockets.

5. When can we expect to see a pure-electric laser-propelled space rocket being used?

While there are ongoing research and development in this area, it is difficult to predict an exact timeline for the use of pure-electric laser-propelled space rockets. However, with the rapid advancement of technology, it is possible that we could see these rockets being used in the next few decades, especially for long-distance space travel missions.

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