Name: Joe Rogan Experience #2023 - Brian Keating
Uploaded: 2023-08-22T00:00:00.000Z
Description: Watch the stand-up comedy video 'Joe Rogan Experience #2023 - Brian Keating' from PowerfulJRE on Comedy Buff. Published 2023-08-22. Transcript available.

Watch the stand-up comedy video 'Joe Rogan Experience #2023 - Brian Keating' from PowerfulJRE on Comedy Buff. Published 2023-08-22. Transcript available.

Joe Rogan Experience #2023 - Brian Keating

the Joe Rogan experience train by day Joe Rogan podcast by night all day
thank you very much for coming man and thank you for bringing all this cool
stuff what is
this old-timey telescope is that one of the sailors used to use that's that's
my spyglass
yeah this is exactly this thing is actually one of the most important
inventions ever made and it
really is the reason I'm probably sitting here with you it's it's the actual
tool not this one but
right the telescope was really the machine that changed the world the most and
what's so cool
about it it acted like a lever that moved the earth from being the center of
the universe back
in Galileo's time what year did they invent it the telescope was invented
around the early 1600s
and there's a popular misconception that Galileo invented it but he didn't he
actually perfected it
so he took it from like you know zero to one basically he took the this spyglass
which was
really never it's amazing people are using eyeglasses for many years and nobody
ever thought
to go take one lens take another lens and go like this no one had ever done
that there was a guy van
liunhoek and um and uh this guy hands lipper she they had been making glass and
they were experts at
making glass in the netherlands but Galileo heard about that and the original
devices that they were
making could magnify things two or three times at most but Galileo realized hey
i can improve this
and then do you know what mankind has always dreamt of doing use it to make
money and use it for military
purposes because with a telescope you could see a ship in the venetian lagoon a
day or two out before it
you could see it on shore and you could see it from the ground so the distance
back then was stealth
technology this took away the stuff it'd be like turning off the b2s you know
ability to have stealth
so he improved it so much it was just inarguable this would change the world so
when was the eyeglass
invented eyeglass was invented you know it's kind of it's kind of cool the eyeglass
was invented in um
uh probably the late 1500s these lenses glass used to be total crap it would be
like looking through a
piece of ice today these lenses are super clear and super clean you know modern
lenses this isn't a
great telescope but it's illustrative and we can use it to do things but what's
so interesting to me
it's just like a quirk of history is when um when these lenses were invented
before then you didn't i
don't know what your vision is but mine's about 2020 it's getting worse as i
get older obviously yeah
but before then there were no standards for how good a person's eyesight was
until they had say the
gutenberg bible was published so in the in the 1400s and 1500s the first movable
fixed type we had a
calibrated standard where you knew how big the type font was and you could say
well joe can only see
something at five feet away that brian can see at 10 feet away or something
like that so then they
realized hey i can't see what brian can say or i can't see what joe can see i
need some kind of
augmentation and they would put lenses on so that was in the in the original
direction from directly
from the gutenberg bible to glasses and then what's so funny is the glasses
then led to making a
telescope and then the telescope led to the earth being moved away from being
the center of the
universe which the gutenberg bible you know in some connotation suggested that
we were so there's a
direct line from the gutenberg bible to the glasses to the telescope to then
now religion is not so
centralized in the age of scientific reason wow so when they first started
using telescopes what kind
of power are we talking about like when galileo improved upon it you said it
was like zero to one
yeah like how many levels of magnification so a good telescope that you can get
i always joke you
know i'm not a doctor but i'm not a real doctor but uh but the only
prescription dr keating makes is
that you should buy your kid a telescope and actually the reason i said this is
the reason i'm probably
sitting here with you is because i became a scientist thanks to getting a
telescope at about age 12.
and you can actually see some i know you've been to like the keck observatories
and you've seen the
night sky from there and that is wonderful but every single thing that galileo
saw with his 20 power
telescope which is not that much not much at all you can get one of those you
know on my website no i'm
just kidding but that was a big improvement it was a massive improvement
because now you could see there were
craters on the moon now you could see there were mountains on the moon the moon
wasn't this perfect
crystalline sphere that the bible and the ancients had talked about it had
flaws imperfections it looked
like it had oceans that's why they're called mare mare seas the sea of tranquility
you know what really
bummed me out what was that when samsung when they got exposed for their
digital zoom for the moon
that bummed me out i thought i was taking a real picture of the moon that's
right i was like this is
amazing there's the flag there's the flag it looks so clear like how do they do
that and then someone
took a photo of a blurry photo of a moon on a screen and it did it to that yeah
exactly so it cleared up
the image it ruined the illusion they should not do that yeah no they should
not do that so yeah when
galileo like boosted the magnification from just a few times that was
sufficient with just a two power
thing like a spyglass like a toy thing you really can't see craters on the moon
you can't see that
there's other like mountains and so forth but galileo really because of the
telescope invented the
scientific method you know of hypothesization of observation collecting data
refining things and
then a lot of people forget the scientific method is predicated a lot of times
on serendipity
like just holy crap something happens you didn't he didn't expect to see
mountain he wasn't saying
my hypothesis is that it formed from the same planetary system as the earth he
just saw it
holy crap and what was the very best telescope that he created as he made them
better he it only
went up to about 20 times because that that um the ability to grind glass was
always the limiting factor
he understood the mathematics of it which was also part like how is what's
called lens equation how does
that work how does light get refracted and focused and in so doing bend and
magnify light and so he
understood it mathematically and could prove it but he also did something
really cool which people don't
appreciate uh the lens in this telescope i don't know should i show it jimmy
tell me it's okay
the lens in the telescope is actually bigger than this brass piece that
surrounds it okay
what gal and that owes to galileo's uh activity so what galileo realized is
sometimes you don't
want to use everything that you have sometimes you want to do what's called
stopping down so you
have for aperture stops in photography so when you stop down something it does
something really
important it reduces what are called systematic effects aberrations unwanted
effects so instead of
maximizing say oh i got the biggest telescope which is what now astronomers
fight about my telescope's bigger than yours
so he said no no you want to stop it down and now i'll actually improve the
quality and you can
actually see this with your own fingers so take take your fingers out joe look
at some light source
look at these stars above us okay make a tiny little triangle with your fingers
uh with your two fingers
and your thumb okay and then go around like one of the stars up there and you
can actually see it pinch
it down to almost a point and you can almost see that it will magnify a tiny
tiny bit and do you get that
effect it's very subtle but you're actually reducing some of the rays outside
of your peripheral vision
essentially that would otherwise come in if you have any like cataracts or
anything like that so what
galileo said is no don't use everything you have actually stop it down make it
smaller make it seem
less efficient but actually improve the quality not the quantity tremendously
and when did they first start
getting them to the point where you get telescopes like the keck observatory oh
yeah that was um so
so the keck observatory and the modern telescopes that we use today are not
this type of telescope
this is called a refracting telescope it uses lenses the lenses change the
speed of light
inside of the medium and that causes light waves at different angles to travel
through different
thicknesses and travel slower and that causes them to converge or diverge as
necessary nowadays that so this
telescope was invented by this guy hans lipparche uh and perfected by galileo
isaac newton came along
almost 100 years later actually he was born when galileo died in 1642 and he
invented not a refracting
telescope but a reflecting telescope of the type that the keck telescopes you've
seen are these are
telescopes that use mirrors like to focus the light they can be made much
bigger they can be made much more
clearer because you don't need glass you just need highly reflective media and
crucially they can be
supported behind them so the limit imagine if you made the biggest telescope of
this kind you know
kind of cheap right so i only brought you know a small phone i could put on
actually tsa almost
confiscated this today they were like what the hell is this thing yeah they don't
know what a telescope
they were like what is this are you going to use it as a weapon um but they can
only be made 30 times the
diameter of this telescope of this little tiny thing the biggest refracting
telescope so those ones that
look like a garbage can in people's backyards uh those are reflecting
telescopes the biggest refracting
telescope is in yerkies observatory outside of chicago or wisconsin southern wisconsin
and it is only 39
inches across so what happens is imagine you have a piece of glass uh over time
the glass will start
to that it right there that's it perfect oh that's pretty powerful i heard jamie's
good wow he's the
best um so that's so that's puny compared to what you've seen in the keck
observatories 10 meters across
10 times that diameter interesting and what kind of power does that one have so
you can get a telescope that
has arbitrary power the power is not the important thing that the what's
important is how clear and
high quality the image can be you can have like the digital zoom it could be
when they zoom in on
your phone say you know if you zoom in the image quality gets crappy but even
though it says oh you've
magnified 300 times so you can magnify arbitrarily just by having choosing the
right ratio of the
curvature of the lens and the distance between these two lenses but to get
higher quality that yerkies
observatory lens started to sag and it has other problems light acts no matter
what uh gets distorted
when it goes through a medium it's actually getting distorted right now as it
goes through the air
and you've seen this effect here's my second prop of the day this is a prism
this is a prism made
just like ordinary glass plexiglass and that refracts light depending on its
wavelength so this is
like the kind of stuff a hippie girl would keep on her her desk right that's
right i can uh you can
make it into a pendant for your wife so that is changing the color the speed of
light is getting
modified depending on its color as it goes through that medium the lesson is
glass affects the color
of lights propagation speed and it affects the quality of it it's called chromatic
aberration so
there's aberration because of the defects like a crack in the glass there's
also a defect that different
wavelengths or colors of light will focus at different points on your eye or on
on a detector
and that's bad because you want everything to come to a point focus you want
everything to be
perfectly sharp and focused and so these lenses once they get above a certain
