85 ответов в этой теме

[SuperJogi]

Ok, so here is a question that is sort of loosely related to the whole radiation issue:

 

Now, according to the codex, to an outside observer, all radiation, that the ship emits is blueshifted to the equivalent of the "FTL factor" (see here).

 

Well let me check this codex entry and see how I can take it apart.

 

Now, according to the codex, to an outside observer, all radiation, that the ship emits is blueshifted to the equivalent of the "FTL factor" (see here). It even mentions that if the ship travels at 200 times the speed of light, EM in the visual spectrum will be shifted to x-rays and gamma rays

 

Well, it says that a ship traveling at 2c will emitt it's light at 2 times the energy, that means E₁ = E₂ x (c₂/c₁), with E₂ beeing the energy of the emittet light inside the field, E₁ the energy of the light after it left the field, c₂ the speed of light inside the field and c₁ the speed of light in normal space.

A photon of visible light has an energy of about 2-3 eV, that times 200 hundred is about 400-600 eV, that puts it in the soft X-ray range, nowhere near close gamma.

A ship would have to travel at 50000c to put it's emission at the beginning of the gamma range with energies of 100-150 keV. Remember my proposed antimatter warhead emitts gamma with energy of 500 keV, that's a ship traveling at 200000c

 

Now, imagine what kind of energy a ship must emit, when it travels at 5000 times the speed of light.

 

10-15 keV, mid-range X-ray, pretty harmless behind a wall.
 

So what would happen if a sip passes by a planet with that kind of speed? Is the actual amount of radiation too insignificant, despite the high energy? Or will it just contaminate an entire hemisphere? Burn it to ashes? I honestly don't know but it sounds like they should better have some dam good shielding for busy traffic routes however they do it.

 

Well, according to my calculations, nothing. Even if you assume that a ship emitts gamma, the radiation should be blocked to a large degree by the atmosphere, unless you assume it exceeds energies of 1 GeV. And even then, the intensity should be way to small to couse harm over large distances.

 

And here is another thing that doesn't make sense:
 

Ships moving at FTL are visible at great distances, though their signature will only propagate at the speed of light. According to Engineer Adams, the SSV Normandy's stealth system does not work at FTL speeds because that blue-shifts the ship's emissions into frequencies too high to capture in the hull sinks.

 

 

 

If the emissions are captured inside the hull, then that means they are captured before they are blueshifted.

 

Oh Bioware (or Engineer Adams)

[MrFob]

Thanks for the explanation. Guess I trusted the codex too much when I assumed it was right about visible light already shifting to gamma.

 

Haha and good catch on the stealth system.

[Vazgen]

Here is the codex on heat management:

 

Dispersal of heat generated by onboard systems is a critical issue for a ship. If it cannot deal with heat, the crew may be cooked within the hull.

Radiation is the only way to shed heat in a vacuum. Civilian vessels utilize large, fragile radiator panels that are impossible to armor. Warships use Diffuse Radiator Arrays (DRA), ceramic strips along the exterior of the armored hull. These make the ship appear striped to thermographic sensors. Since the arrangement of the strips depends on the internal configuration of the ship, the patterns for each vessel are unique and striking. On older ships, the DRA strips could become red- or white-hot. Dubbed "tiger stripes" or "war paint" by humans, the glowing DRA had a psychological impact on pirates and irregular forces.

Strip radiators are not as efficient as panels, but if damaged by enemy fire, the ship only loses a small portion of its total radiation capacity. In most cases, a vessel's DRA alone allows it to cruise with no difficulties. Operations deep within solar systems can cause problems.

A ship engaged in combat can produce titanic amounts of heat from maneuvering burns and weapons fire. When fighting in a high heat environment, warships employ high-efficiency "droplet" heat sinks.

In a droplet system, tanks of liquid sodium or lithium absorb heat within the ship. The liquid is vented from spray nozzles near the bow as a thin sheet of millions of micrometer-scale droplets. The droplets are caught at the stern and recycled into the system. A droplet system can sink 10-100 times as much heat as DRA strips.

Droplet sheets resemble a surface ship's wake through water. The wake peels out in sharp turns, spreading a fan of droplets as the ship changes vectors and leaves the coolant behind.

 

The idea is probably that the ship will generate heat too fast for the droplets to be recycled into the system.

[SuperJogi]

Thanks for the explanation. Guess I trusted the codex too much when I assumed it was right about visible light already shifting to gamma.

 

No problem. And btw. my calculation is 100% better than BW ones because the energy of a photon is defined as: E = hc/λ

Which makes my formula above correct if you assume energy is conserved when a photon leaves the ME field. ¹
 

The idea is probably that the ship will generate heat too fast for the droplets to be recycled into the system.

 

That makes much more sense. Still means that Adams has no idea what hes talking about.

 

¹Edit: Of course now we get into whole mess of ME fields messing with fundemental constants, a topic for another time and something that should be ignored here. The ME field would also change plancks constant which makes the above calculation wrong, but again, a physical mess for another time.

Сообщение изменено: SuperJogi, 16 Май 2015 - 01:07 .

[MrFob]

Oh, one more thing about the stealth: They say that the sinks trap heat, which is apparently usually used for scans but the ship is still visible. What if Adam's meant that this type of radiation (e.g. the light from the thrusters) is blue shifted, which may make it easier to detect.

[SuperJogi]

Meh, I just realized I did the same mistake as the codex. I equated the ships speed with the speed of light in the ME field, but obviously the speed of light would be much higher then the speed of the ship. That makes the codex entry even stranger, because I initially just thought BWs math was off, but now the entire principle doesn't make sense. Anyway a good reminder why you shouldn't mess with fundamental constants.

 

changing constants = big mess

[sH0tgUn jUliA]

Ah, during the Battle of Illium, the Asari used a large number of fission weapons against Reaper transport vessels instead of against the nearly invulnerable capital ships, delaying the ground invasion while the reapers had to go convert more husks attack later which they do at the end of the game.

[NCR Deathsquad]

Shepard can just blame it on Kirrahe. Especially if Kirrahe's dead.

sounds like something saren would do

[Silvair]

Well you mentioned Vamp so here's an example from Wiki:

"...He also seemed to have a degree of control over one's shadow. This was especially apparent during his fight with Raiden in the purification chamber where he could impale Raiden's shadow and prevent him from moving. Otacon hypothesized that this "shadow-binding" technique, also known as Kagenui, was some form of hypnotism; the power of suggestion augmented by Vamp's speech and movements, coupled with the manipulation of the light reflecting off the blade of his knife."

May the flying spaghetti monster save me from Metal Gear's version of "hard science". Amen.

Regarding Nukes, it wouldn't be out of the question that at this point in time nukes could have become more efficient than our nukes, and therefore more effective.

As I said like 5% is straight superpowers. The rest is hard science.

Most of that 5% is all vamp lol.

But things like Metal Gears and the Rail guns firing nukes, which is the part I'm referencing, were mostly hard science.

[Treacherous J Slither]

As I said like 5% is straight superpowers. The rest is hard science.

Most of that 5% is all vamp lol.

But things like Metal Gears and the Rail guns firing nukes, which is the part I'm referencing, were mostly hard science.

Not only did Vamp bind your shadow and walk/run on water, he also ran up walls. He also had fangs and ice cold breath.

Nanomachines nothing that dood was straight up superhuman.

[vargr1105]

*activate Mordin impression*

 

Polonium: Powerful alpha emitter. Deadly when ingested. Blocked by piece of paper.

 

 

Infrared. Harmless.

 

 

Particle radiation. Blocked by kinetic barrier. Only dangerous at high velocity or ingestion.

 

 

Small amounds of X-ray or gamma used to kill microscopic liveforms. No contamination. Harmless.

 

 

Radio, microwave and infrared -radiation. Harmless. Powerplants, if nuclear, might emitt tiny amounts of gamma. Harmless at this dose.

 

Wanna try agian?

 

 

*activating Elcor impression*

 

Uncontained amazement: Wow!

 

Sincere and laudatory admiration:  Bravo, sir. You post not only made me laugh out in an audible manner; it was also educational.

 

Apologetically: I am sorry for quoting the whole post in this reply of mine, but alas, I could not help my self.

 

 

EDIT:

 

With self-recriminating irritation: And apparently I can not even quote a post in its entirety correctly.

 

Resigned acceptance: Oh, well. The error is done. No use crying over spilled milk.