how is dark matter detected in the Universe?

Question

a) by its electromagnetic interaction with light
b) by its gravitational effect on normal matter or light
c) by its "anti-gravity" effect on the galaxies
d) by its X-ray emission
e) dark matter cannot be detected

Answer 1

b. don't think you're the only one who watched the Stephen Hawking movie.

Answer 2

I too sympathise with Doppler. The new ideas about dark matter and dark energy are a good example of the greatest weakness of science: the simplest explanation for observed phenomena becomes accepted theory, even if it is imperfect. Whether it is actually CORRECT is never the question.

Then, to deal with the imperfections, scientists try to modify the theory, with the result that it either becomes less simple, or less of an explanation. "Cosmic strings" are an example of the latter. Dark matter and energy are another. If accepted, they will raise more questions than they answer, forcing physics to revise all its ideas about matter and energy in general.

If that happens, it won't be the first time decades of physics theory are swept away for something new, and it won't be the last either.

Answer 3

the answer is b. dark matter can certainly be detected all around us, even in our own galaxy, in order for the movements of the stars to be adequately explained dark matter must be taken into account most of the mass of the galaxy has to actually be along the outer edges, not in the core.

we can see it when a distant galaxy cluster acts like a lens, usually the mass of the visible matter in the cluster is not enoguh for it to lens properly, dark matter must be taken into account.

also they think that some has been seen directly to, but so far that was only one picture.

for the msot aprt it cannot be seen directly but only through indirect reasoning it can be found. so b is the right answer.

if e was the right answer then we wouldn't have any way to know that it was there and subsequently there would be no theory of dark matter to begin with.

Answer 4

Doppler is so right. Dark matter has not been detected so far. It is still open to prove if it exists or not. So far is exists in models to explain the physics of the universe.

It's E

If it could be detected we would have a map of where in the universe there is how much dark matter sitting.

Answer 5

I believe it's E... dark matter has no known properties... it is a theoretical to explain the gap between what we can detect and the amount of matter required for certain universal models.

Of course I could be wrong...

Answer 6

E. Dark matter cannot be detected, even if it was in your backyard. In my opinion, dark matter is just being theorized as a strong stellar force. If the universe contracts anyday now, it means there is dark matter just anywhere. But don't worry, you won't live up to see it all happen...

Bye.

Answer 7

You mean blackholes . They are dark and black but can be detected even you can detect them. If you see a no of stars in a line or probably a huge no of stars crowded around a particular point that means the point is a black hole so its
b.

Answer 8

hey, dark matter has not yet been detected.....
it has only been postulated... that is scientists think that there might be some kind of thing which has some sorts of properties, which might give rise to some phenomena like the ones u have mentioned in your options.....

Answer 9

There r various gases in universe for example nebulas.Some nebulas cant be seen through telescope but through x rays emissions it can be seen.....