Full transcript
0:00thing is as we get to the higher energy
0:02P Spectrum things get trickier we don't
0:05use the same setup as for Visible I mean
0:08the idea is still the same when we're
0:10looking at X-ray and gamma ray we still
0:13want to gather the Rays and try to focus
0:16them but this becomes much much more
0:20difficult thing is these are very high
0:22energy Rays they will tend to be
0:25absorbed they won't be able to be as
0:28easily reflected by a mirror they
0:30probably just be absorbed by them and
0:32what they eventually realized with
0:33x-rays is that what we had to use is
0:35this idea of grazing incident
0:38Optics grazing incident Optics sounds
0:42fancy but when you really think about
0:43the word
0:45grazing we're slightly deflecting the
0:48x-rays just like this image shows rather
0:50than a mirror that you're reflecting off
0:52of you barely graze the surface and that
0:56can cause the x-rays to be deflected
0:58going through a few different grazing
1:01periods it can actually be focused to a
1:03point still so with x-rays we still can
1:06get a nice focused image it's just the
1:09setups a little bit
1:11different gamma rays for most purposes
1:14we don't actually get to focus them it's
1:17a very difficult
1:19thing I mean we're hoping over time to
1:23get better at this
1:24but most cases we are collecting the
1:27light for gamma rays not really focusing
1:31it in many of those telescopes
1:33so but we can study gamma rays other
1:37ways and it's important to I mean think
1:39about it this is the highest energy Rays
1:42there are meaning these are the most
1:46energetic most violent events in the
1:49universe we want to study them we want
1:51to see what's going on out there we're
1:53seeing incredibly active galaxies we're
1:55seeing Supernova violent explosions we
1:58want to study those so we still need to
2:01study gamma rays we do use gamma ray
2:04astronomy and telescopes but we also
2:06study gamma rays sometimes from Earth
2:10especially what we can do is see how
2:12gamma rays interact with our atmosphere
2:15basically when the gam Rays hit our
2:17atmosphere it can cause a reaction it
2:21can cause other charged particles things
2:23like electrons in our atmosphere to
2:26react and those will end up giving off
2:28radiation and by studying that we can
2:31learn about the gamma rays out there
2:33again we still use telescopes of course
2:35too if you look at uh table 6.4 in your
2:39book it talks about some of the
2:40different gamma ray telescopes we have
2:43in space but we also can study it from
2:46Earth in this kind of indirect way we
2:49can finish off by looking at one of the
2:50large telescopes they're proposing to
2:52build which is the European extremely
2:55large telescope one of the ones we
2:57pointed to earlier this is going to be
2:59an earth-based one this is just what an
3:01artist thinks it's going to look like
3:03this is going to be a huge
3:05groundbased telescope approximately
3:0939.3 M the mirror so
3:12huge well this one's to me it's
3:16incredibly exciting they're hoping that
3:19this one will actually be able to start
3:21looking at how planets are forming
3:25around Stars something we're trying to
3:27study we're finding more and more stars
3:29have planets around them something
3:31that's talked about more in astronomy
3:32part 2 but we do find many planets are
3:36forming around stars and we want to
3:38start studying those how they form and
3:40more importantly actually trying to get
3:43images and study the Spectra CU
3:46ultimately we hope to see if there's
3:50life on these planets definitively prove
3:54life exists elsewhere Beyond us an
3:57incredibly important and exciting
3:59mission
4:00so some things to look forward to