Cosmology Lecture 9 

I am a freshman in community, currently taking introduction to physics. And I love these lectures, and I would just like to thank all in involved in the sharing of this knowledge.

Fascinating subject!!.Also nice camera and volume work(so we can hear the questions.Thx for posting.

Another excellent series of lectures by Professor Susskind!. Thank you so much!

Mike Ermantrout here is a very informative parking professor

Thank you -- these are great, and the production values have improved greatly -- better resolution, and the camera action; the content is of course first rate as always.

that's the best discussion of magnetic monopoles I know of

So am I correct to surmise that the scalar field equation is always first before any other calculation so that the potential energy of the field can be added to the equation for balance?

I’m not even close to being in College and I’m still watching us so I can outsmart my classmates

With regards to expansion beyond light sheets, if worm holes are created before then even if the light sheets go beyond observation or interaction with us we should still be able to access all of space and possibilities through the already established worm holes..

did I get it right that the radius of the event horizon depends on the "hubble thing" and not on the age of the universe?

can you insert the subtitles in this lesson and in the previous lesson 5? Thank you and congratulations for this exceptional course in cosmology

great lecture...all of his lectures are great!!

In a field I am what is missing I displace the field, but when I move I allow places to be filled. I move, to keep things whole.

Groucho Marx red shift comment was hysterical! :P

Good information Great video

かなりいい動画だよ。参考になった

I wish the eminent Professor would repeat the students' questions

Assuming that the universe is continually expanding, your "little box", unless used in an equation which is solved instantaneously, must stretch and grow with the growing universe or the equation and solution, are immediately no longer valid!?!?!

This lecture was great!

Ex physics student here. Have been working in Data Science now for 8 years. I enjoy watching these lectures! ❤❤ BTW did someone take notes? If yes, it would really help me and everyone to refer to them whenever we have forgotten something.

It works wonderful for engineers

This and 5. Dollars will by you a cup of coffee at this jucture

Enjoyable. Thx

I read that it took ~10 seconds for the universe to cool enough to produce photons. Does this mean that there's a stretch on the putter most reaches of the universe that we can't see not because they're too far away but because they're beyond light? How big could the universe have gotten in those 10 seconds? I imagine quite large

Why this lectures has different continues in time?They are not fixed in time duration?

Once the density of the field decreases, can buoyancy take over and reverse it course up the curve?

So isn't the potential energy of the residual inflaton-field ( V(phi) today) a candidate for dark energy?

good video

I just cant get with this, as much as I want to, as hard as I try...

I would like to see the pictures he is talking about at 1:46:43

Awsome performance in that age

awesomeness

Man I'm all about these cosmology lectures and Leonard Susskind is the man but pushing hard & fast numbers around in early Universe theorem isn't what I'm interested in.

It gets very interesting after the 1:22:00 mark to 1:33:00

The QM-TIME principle is the limit of reduction, and Reductionist thinking, ..as simple as gearing in concept, and infinitely complicated and messy in applications to the observable universe. So most experience is thoroughly embedded in the context but perceived to be mostly a collection of thumb rules and piecemeal events separated by gaps between compound pulses of information. Signals, ..Electronics Engineers have "solved" the riddle of the Universe, empirically, using appropriate placement of materials in effective geometries that modulate-demodulate quanta of information sequencing into intelligible data and representations of physical phenomena. Most Electronic devices are using a crystal oscillator that converts, with filtration and refinement, one FM signal to another by reflecting them, "entangling" and integrating them, off a designed "singularity". So the environment of the Quantum Fields Mechanism is evident in principle, by a combination of intentional design and "inadvertent" occurence of material properties, ..within the crystal multi-oscillator device model of signals processing. Digital devices are using the 1-0D geometry to make "clean" and clear signals via binary logic error correction-computation. This basic concept of modulation by naturally occurring design, within the mathematical properties of a temporal superposition singularity, is "understood" empirically, by "laws of mathematics", ("lawful precedent" is approx equivalent to "sum of all histories"), in the big picture of existence, but not so much in the full modulation-substantiation spectrum, of eternity-now, in principle. The link between Quantum multiplicity and Uncertainty Principle has yet to be elaborated, for the "Gaps between Primes" eg etc. (This is the kind of detailed (significant-signal) knowledge provided by Professor Susskind's lectures.) The implication of the applied QM-TIME principle is that existence is a Universal wave-package =signal, of integrated and entangled quantum information, ..the manifestation of an observable objective in perspective as a dynamic physical material in context, and substantiated by the mathematical structures that are the eternally-enduring sum of all histories, ..in crystalline/quantum modulation-fields, now, ..equivalent to scalar fields in the Cosmological context. This lecture is concerning quantum-scalar (?) fields within fields of varying density and intensity, and different "gearing" proportions of engagement-viscosity. If existence is Quantum 1-0D and the spacetime where we exist is 1-2D times 3 planes of a brane in perspective, then the EM fields are also the engagement by half D probability distribution, in-of 1-2D inverse, such that the superposition 1-0D is a 4D EM-space of harmonic cofactor orthogonality. 5D is the beginning of "complicated and messy", implying weak probability engagement because of the gap between dominant prime-probability and "solid" temporal duration in liquid multiples of field inflation, eg 1-5th timing-spacing field density on a ln "e" scale of corresponding probability-existence, occurence-conduction points? The actual occurrence, or lack of occurrence of monopoles, and the composition of this Anthropic observable universe, is definitely due to how the Quantum Fields are distributed-manifested and engaged "locally", ..biologically. This logic is inevitably Pi circular, it's possible because it exists in the observable probability provided by eternity-now possible occurence opportunity. "e-foldings", equals the quantization of 1-0D eternal omni-dimension by e-Pii singularity-now fractal units of orthogonality?, ..very complicated and messy. Eg a "hot Big Bang" would be much more likely to be chaotic and lumpy than what appears to be the observed universe, but a Pure Math confinement of potential change in this Evolutionary State is inevitable, in a self-referential=>biological system of QM-TIME. (?) Cause-effect applies to change-now probability, in possibility-potential, in an immutable limiting context of Eternity. QM-TIME multiplicity. The Singularity Vanishing Point, Unity-Origin, is the limit restriction of cause-effect=multiplication-division of one, now-simultaneously, inherent-potential change which is entirely Mathematical phase-states and change of shape in quantum chemical resonance unitary bonding, ..and perceived psuedo random uncertainty, ..Superposition "Annealing". At the bottom of the pool.., showing the limit condition of axial-tangential brane in perspective, 1-0D infinite vanishing point, "i" reflector of eternity, and resonant real objectives in the brane of temporal vertices, now. (The Sun is a reflector of excluded frequencies from condensing, inclusive binding energy) Differentiating identifies the "center of mass" (=>classical) perspective VP of specific tangency-brane in spacetime terminology, for timing-spacing Feynman Diagram vertices.

Does anybody have the pictures that L.Susskind sent to the students for this lecture? Thanks

The function PHI is at the root of all explanation, and is just too simple.

The relational world of Leibniz demands that all participants be considered in our equation in order to give an explanation (a parameter like mass or time taken in isolation signifies nothing- Lee Smolin). If the parameter space gets more and more complicated as time goes on we are in deep trouble.

I just realized we might have arrived late to the party. Perhaps we are only getting a small part of the information we'd need in order to really understand the universe. "People" in a trillion years will be in a even worse position. It'd be fascinating to see their conclusions about the universe and life in general. They will probably think they are so special and unique. Or maybe, by that time, they'll have learned to time travel already.

After reading the comments, i've came to the conclusion :The more stupide people get, the less they respect Knowledge

Where is Cosmology Lecture 10??

I'm having lunch when hearing "wooh now we know what H is, the H is honey"…………笑死我了，差点一口饭喷屏幕上

Is the 9 lectures enough

Was Sol Rosenberg in this class?

love

Are we to accept that this field , as drawn , can apparently have a value of zero , and yet have a large potential energy.?

Wtf since when did mike ehrmentrout from breaking bad become a cosmologist

After much thought and reflection, I have come to the conclusion that Leonard Susskind is actually John Malcovich in disguise.

Oh. Dios si fuera traducida seria genial para nosotros los latinos.

Its a big scalar field 55%

1:04:20 Did someone just ask 'when did the onset of inflation occur in relation to decoupling'? Wow... 'Decoupling' (surface of last scattering) didn't occur for around 400,000 years -after the onset of *inflation (*which began at around 10^-43 seconds or less). I only have a GED, but if Stanford would like to sponsor me... ;)

Could one think, the expansion of space is a dimention of it self ?

Somebody should show him Bioshock Infinite and make him explain it.

Or more likely the other way around? The less they respect or even area able to recognise knowledge, the more stupid they get. But what is their alternative?

Look at our own known universe as a super massive black hole. Round and spherical with a gravitational singularity. Gravity bends the space-time, causing a multi-lateral orbit of light and information. Matter from outside of our known universe is brought in at the event-horizon and scattered radiating on the outside. Everything we see around us is in the past, just a matter of re-organizing the information to find out that it all came from the same single point. How, I don't know just what I see

IF NOTHING HAPPENS SPONTANOUSLY , THEN HOW CAN YOU SAY THIS ELEGANT UNIVERSE CAME ABOUT BY CHANCE, MR. SUSSKINDE?

This all sounds like fantasy and doesn't sound scientific. I'd need to see way more complete math before I believed this.

this is too much of luck...less of deduction