What is the physics of screen glare? What is happening exactly?
Why is it that when you look at a piece of paper in the sun, all the colors are really vivid, even if you look at a picture on the sun you can see every individual color even more crisp and with better contrast than in the shade, but an LCD screen will be barely visible in direct sun?
Is this something that can be solved in theory, so a screen will behave more or less exactly like a piece of paper would?
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>>9077488
A piece of paper only reflects light while a screen has to produce it's own light. The sun's light is extremely intense, if you want your screen to be just as bright it would eat through your battery in minutes.
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>>9077488
because the sun rays beat the shit out of the screen rays when they interact
also e ink exists
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>>9077488
https://en.wikipedia.org/wiki/Albedo
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I received an e-mail today with the following link:
https://www.universetoday.com/39966/drake-equation-1/
...in which the author wrote:
>If we run those numbers through the Drake Equation,
>we end up with a value of 10 ... civilizations in the Milky Way
>at any time capable of sending out signals that we could detect.
Using the (lower) value of 100,000 light-years for the diameter
of our galaxy, then its disc area is at least 7.9billion light-years2
Dividing that by ten civilisations gives us an average of
790million light-years2 disc area per civilisation, so the
average distance between civilisations is at least the radius
of a disc of this area, which is about 16,000 light-years.
That is a helluva long distance.
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The article says 10 possible, not actual, civilisations. Since the probability of intelligent civilisations actually emerging is probably very small, the real number is probably 0.
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>>9077395
>the probability ... is probably
Lrn2probabilly
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>>9077372
>signals that we could detect
There is the main problem, right now our ability to detect signals is very limited. In fact we could only detect a civilisation if it is in our own solar system. There could be an advanced civilisation in every nearby stellar system sending radio signals like we do. We just don't know.
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1 A
The reason they rooted for the pineapple was to avoid looking like jackasses and they ended up looking like jackasses anyway. Eating the pineapple was their revenge.
2 A
The others all expected a pineapple to win a race, which is pretty fucking stupid.
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1. a
2. d
256 iq reporting in
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>>9077363
1. D
Even if they were annoyed, amused, or hungry, they wouldn't eat the pineapple if they didn't want to.
2. A
What the other guy said.
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Can matter be created or destroyed?
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>>9077628
MODS
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>>9077174
Until someone can prove otherwise, no.
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>bizarre thought
Ok guys do you about like how one of the laws of quantum mechanics is that when a particle is unobserved it exists in multiple states at once? Ok so that would mean that before life could observe the universe in some way then literally everything existed as every state possible at once. And that somehow particles on a planet arrange themselves in such as to create life and when that happened everything in the fucking universe collapsed into into a single position. And when life is gone the universe will literally just go back to how it was before that period as a bunch of particles existing in different states all at once until life happens again.
Do you believe we're all co-creators of reality and thus god's in our own way? I am wrong?
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>>9077138
>unobserved
Standard response is that particles can be observed by interacting with other particles, observation is not restricted to living, conscious observers.
Trouble is QM says observation results in entanglement of particle/observer, not the particle going into a single state.
But as conscious observers we see particles in single states and as far as we can tell the mind of a conscious observer is the only place they behave that way, which is where the conscious observer idea comes from.
QM results like entanglement violate locality, quantum erasers seem to allow retrocausality so the entire universe collapsing out of a wavefunction a hundred years ago with its entire history intact isn't too stupid an idea except
>somehow particles on a planet arrange themselves in such as to create life
the particles you need to trigger the collapse are themselves in multiple states. Did one state hit probability=1 and cause self-collapse for some reason?
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How fucked am I if I take Calculus 1 with only a little knowledge of Trigonometry?
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>>9077061
Do you know sin^2(x)+cos^2(x)=1 and SOH CAH TOA?
If so, you will be fine.
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>>9077061
Well, here is the final redpill very few will be able to tell you:
Most people do not remember all trig identities. Most people only remember the ones mentioned by >>9077065 which are fundamental. Perhaps plus the ones that are similar to that but involve tan, sec and csc because they also help for trig sub.
The point I am trying to make is that trigonometry is like a hooker. If you have a test tomorrow then you call your trig textbook at night. Meet her at a cheap hotel and then study her all night before the test. And then you part ways with trigonometry! Trigonometry won't be calling you back. Trigonometry won't be telling about how her day was at work. Trigonometry is a hooker, and you need to treat her as such.
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These three identities are the only three I used in multivariable calc. >>9077264 . I only used the first two in calc I and II
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Only Engineers can reply in this thread. Doesn't matter if you are a practicing engineer or an engineering major.
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I'm testing your hypothesis that only Engineers can reply in this thread by attempting to reply even though I'm not an Engineer.
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Im a plasterer, can I join this thread?
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>>9090880
To confirm that you are not a statistical anomaly i myself as a non engineer am posting in this thread thereby further disproving the original hypothesis.
Anonymous
Sci approved curriculum 2017-08-01 03:52:58 Post No.9077057
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Sci approved curriculum 2017-08-01 03:52:58 Post No.9077057
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So I decided not to go to university but, I still want learn Maths/Science in my spare time.
What is a /sci/ approved curriculum for Mathematics and Physics?
>inb4 brainlet
>inb4 just go to uni
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>Mathematics
throw this in google translate
http://imperium.lenin.ru/~verbit/MATH/programma.html
physics:
http://www.staff.science.uu.nl/~gadda001/goodtheorist/index.html
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>>9077057
math:
how to prove it
spivaks calculus
hubbard and hubbards vector calculus
probability by bertsekas
ordinary diff eq - tennenbaum
partial diff eq - evans
baby rudin
papa rudin
abstract algebra - dummit foote (bit too encyclopedic)
elements of set theory - enderton
mathamatical logic - enderton
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Is there an easy way to differentiate calcium sulfate dihydrate from calcium sulfate anhydrous?
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>>9077046
Well, they're spelled different, for one.
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>>9077046
yes
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>>9077046
snort it down ur dikhole
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So Enchroma glasses are meant for colorblind people to see full color, but would it enhance color for those who aren't at all colorblind? Or would it just have no effect to begin with? I don't want to buy enchroma glasses just to test this out because I don't need them and my curiosity is at its peak
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>>9077030
It filters out parts of the color spectrum and allows those who are colorblind to differentiate colors more easily. If you can already differentiate it does nothing but remove some color.
https://en.wikipedia.org/wiki/Cone_cell
I currently have a 542 points/746 points in Calc 3.
My final tomorrow is worth 200 points, 20% of my grade. Total points will be 946. Assuming I'm just looking to pass with a 70, is my math correct in saying I need at least a 60% on my final to pass the class? This seems like such an easy thing to calculate but it almost seems too easy, which will lull me into a false sense of security in which I fail the final.
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>>9077029
947 * .70 - 542 = 120.9 points
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>>9077037
and 120/200=60% so I was correct
neat
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What would you say is the best /sci/ magazine?
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>>9077001
Science or Nature
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>>9077001
ieee
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National Geographic
Anonymous
what's the physics behind this? 2017-08-01 02:46:16 Post No.9076977
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what's the physics behind this? 2017-08-01 02:46:16 Post No.9076977
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what's the physics behind this?
Anonymous
2017-08-01 02:46:16
Post No. 9076977
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https://www.youtube.com/watch?v=kVHi2kJLXVo
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brain damage
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I (think) I've calculated how many possible tic-tac-toe games (played to completion) there are.
I figured on the first move, there are 9 possible moves. On the second move, there are 8 possible moves, then 7, 6, 5, and so on.
So the total number of potential games should be 9!.
But some games don't take up the full 9 moves because they are won before the board is filled up. So how many winning games are there?
The absolute earliest one can win is on the 5th move. E.g: X, O, X, O, X (win). There are 8 ways to do that.
Likewise, there are 8 ways for O to win on the 6th move, 8 ways for X to win on the 7th move, 8 ways for O to win on the 8th move, and 8 ways to for X to win on the 9th move.
Is there anything I'm missing? Because it looks like it's easier to win if you're the first player. That doesn't sound right.
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>>9090713
So there should be 9! - (8*5) or 9! - 40 ways to win. I just need to know if there's anything I missed.
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>>9090713
Now take into account rotational and reflection symmetries that will make many of the move sequences the same.
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If you aren't studying in STEM to explore philosophical question, you are a pseud.
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>>9090641
>fell for le "math is universal truth and learning more will give meaning to my meaningless life"
>doesn't realize its the apotheosis of rabbit holes
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>>9090647
>philosophy
>meaning of life
You 12 dude?
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>>9090641
If you aren't studying in STEM to do achieve what you desire, you are a dingdong