0766: "Green Flash"

This forum is for the individual discussion thread that goes with each new comic.

Moderators: Magistrates, Prelates, Moderators General

0766: "Green Flash"

Postby Litof » Wed Jul 14, 2010 3:48 am UTC

Image

Alt-Text: The exact cause of the phenomenon is unknown, but it's thought to be linked to atmospheric refraction and you getting a really cool car.

Personally, I find the colors in this comic to paint a really beautiful picture: the blacks mixed in with the sunset of deep oranges and reds, all topped off with the silhouettes of the two watching on. Though, one question: is that a weapon or a shovel in black hat's hand?
User avatar
Litof
 
Posts: 167
Joined: Wed Mar 24, 2010 10:56 pm UTC

Re: "Green Flash" Discussion

Postby Duo Nox Sol » Wed Jul 14, 2010 3:51 am UTC

This truly is a beautiful comic. At this hour, sadly, (and, perhaps, intriguingly,) I can't look at the brighter colors directly without some adverse effects. The detail Munroe put into this is absolutely amazing, and at a slight angle, the colors seem to take on a dancing, if indefinable, light of their own. Good job, and it's one of the best so far.
"Because "atheism" is a entirely better description of the universe, only theists feel superior. Hard as it is for theists to admit, we atheists actually don't have to feel superior, we simply are so."
Duo Nox Sol
 
Posts: 6
Joined: Mon May 31, 2010 7:50 pm UTC

Re: "Green Flash" Discussion

Postby manmantong2000 » Wed Jul 14, 2010 3:52 am UTC

Rarely a XKCD comic with the graphic more impressive than the content, in comparison with the rest of XKCD comic of course. I liked the content too (I never know that green flash thing actually, is good to know).
"Me no speak English" makes perfect sense.
User avatar
manmantong2000
 
Posts: 51
Joined: Sat Sep 26, 2009 8:24 pm UTC
Location: New Jersey, United States of America

Re: "Green Flash" Discussion

Postby Lucia » Wed Jul 14, 2010 3:52 am UTC

I don't think th Black Hat Guy does hand to hand much. Too simple. Too little scope for bloodshed.

...also, did you just imply that BHG can't use a shovel as a weapon?
Wildhound wrote:Nobody ever sigs me. I think it's because I never say anything clever.
Lucia
 
Posts: 82
Joined: Sun May 09, 2010 1:35 am UTC

Re: "Green Flash" Discussion

Postby BytEfLUSh » Wed Jul 14, 2010 3:54 am UTC

Looks like a bottle to me :)
Image

Image

-- Professor Dan, The Man from Earth (paraphrased)
User avatar
BytEfLUSh
 
Posts: 294
Joined: Sat Jan 02, 2010 1:15 am UTC
Location: Sombor, Serbia

Re: "Green Flash" Discussion

Postby Litof » Wed Jul 14, 2010 3:57 am UTC

Lucia wrote:I don't think th Black Hat Guy does hand to hand much. Too simple. Too little scope for bloodshed.

...also, did you just imply that BHG can't use a shovel as a weapon?


Last I checked, most of his tools were of the silent, perception-altering variety. :P
User avatar
Litof
 
Posts: 167
Joined: Wed Mar 24, 2010 10:56 pm UTC

Re: "Green Flash" Discussion

Postby LesZedD4 » Wed Jul 14, 2010 3:58 am UTC

I think i want a poster of this one for my bedroom, just without the text.

XKCD Sunset. perfect last thing to see at night, and first thing to see in the morning.
LesZedD4
 
Posts: 11
Joined: Sat Nov 14, 2009 4:42 pm UTC

Re: "Green Flash" Discussion

Postby sonia » Wed Jul 14, 2010 4:04 am UTC

BytEfLUSh wrote:Looks like a bottle to me :)


and to me. I thought that was the reason behind the green flash pun- a flash of a green beer bottle before the person gets knocked out. :P
though my love would make you bloom,
you turn with fragile grace
to gaze in aching loneliness
at someone else's face...
User avatar
sonia
 
Posts: 8
Joined: Fri May 28, 2010 8:28 am UTC
Location: Auckland, New Zealand

Re: "Green Flash" Discussion

Postby sars vs bird flu » Wed Jul 14, 2010 4:05 am UTC

Did you know that if you stare at the sun, you get retinal damage?
sars vs bird flu
 
Posts: 1
Joined: Wed Jul 14, 2010 4:03 am UTC

Re: "Green Flash" Discussion

Postby Linux0s » Wed Jul 14, 2010 4:06 am UTC

In many years of taking pictures at sunset I've seen the green flash once. The name is misleading though, it wasn't green like you imagine but a weird greenish yellow. And it wasn't a flash either, lasting probably a minute.
If the male mind truly were a machine it would consist of a shaft and a bushing.
User avatar
Linux0s
 
Posts: 223
Joined: Sat Dec 29, 2007 7:34 pm UTC

Re: "Green Flash" Discussion

Postby Stay_Puft_marshmallows » Wed Jul 14, 2010 4:08 am UTC

I'm prepared to cite the use of color and perspective and declare today's comic the shark-jumping point for XKCD, if for no other reason than to be a ridiculous contrarian.
text goes where?
User avatar
Stay_Puft_marshmallows
 
Posts: 37
Joined: Tue Jul 31, 2007 2:01 pm UTC
Location: third tube from the left, and straight on till morning

Re: "Green Flash" Discussion

Postby BlueNight » Wed Jul 14, 2010 4:14 am UTC

The next time someone calls out xkcd for being "just a lame stick-figure comic for PhD wannabes", this is the comic to cite.
---------
BlueNight
User avatar
BlueNight
 
Posts: 268
Joined: Sat Aug 18, 2007 3:59 am UTC
Location: Albuquerque

Re: "Green Flash" Discussion

Postby wr3cktangle » Wed Jul 14, 2010 4:14 am UTC

As a kid, I used to lay upside down on the slide and stare at the sun.
Today, I wear glasses.
Maxim 33. When faced with the unusual, self-destruct.
My blog
User avatar
wr3cktangle
 
Posts: 75
Joined: Tue Aug 01, 2006 5:03 pm UTC

Re: "Green Flash" Discussion

Postby Sartorius » Wed Jul 14, 2010 4:18 am UTC

Teslas are the only cars that have made me go "Damn, that's sexy car." I'd love to own one.

Beautiful comic.
"Give a man a fire and he's warm for the day. But set fire to him and he's warm for the rest of his life." -Terry Pratchett
User avatar
Sartorius
 
Posts: 506
Joined: Sun Jul 29, 2007 6:21 am UTC
Location: Oh? Hi! Oh.

Re: "Green Flash" Discussion

Postby rog » Wed Jul 14, 2010 4:21 am UTC

For a text-free poster version...
http://a.imageshack.us/img30/7571/xkcd.jpg

Edited, upscaled, sharpened slightly and attributed

It's not perfect, but there ya go :)
In the spirit of thefairest.info ... "More Betterer"
rog
 
Posts: 10
Joined: Fri May 21, 2010 5:13 am UTC

Re: "Green Flash" Discussion

Postby GyRo567 » Wed Jul 14, 2010 4:39 am UTC

BytEfLUSh wrote:Looks like a bottle to me :)

Bottle?! Then hittin' him's self-defense, idn' it?


EDIT: Also, I totally thought Pirates of the Caribbean just made that up about a green flash at sunrise/set. Physics just gets cooler & cooler. :]
I came here to read a cool post, a witty dialogue, a fresh joke, but stumbled upon a "bump"...
Way to go, jerk...
~CordlessPen
User avatar
GyRo567
 
Posts: 107
Joined: Sun Jun 01, 2008 4:59 am UTC
Location: Austin, TX

Re: "Green Flash" Discussion

Postby ARandomDude » Wed Jul 14, 2010 4:46 am UTC

rog wrote:For a text-free poster version...
http://a.imageshack.us/img30/7571/xkcd.jpg

Edited, upscaled, sharpened slightly and attributed

It's not perfect, but there ya go :)



I love it!
Also, if thats whats-her-name-that-I-forget, there's no way he's going to have an easy fight.
ARandomDude
 
Posts: 60
Joined: Mon Dec 28, 2009 7:10 pm UTC

Re: "Green Flash" Discussion

Postby SomeRandomPyro » Wed Jul 14, 2010 5:10 am UTC

Okay, for some reason my quote buttons aren't working, and I'm a lazy sob, so here goes:

In many years of taking pictures at sunset I've seen the green flash once. The name is misleading though, it wasn't green like you imagine but a weird greenish yellow. And it wasn't a flash either, lasting probably a minute.


The length of the green flash varies greatly. It can last up to 14 minutes, somewhere in the Arctic Circle— 7 minutes at sunset, then 7 more at sunrise, directly after. I've read before exactly why it does this, but can't remember.

And Litof, he's been known to use some fairly bloody weapons, too. Check 515. (Preemptive yeah-but-we-didn't-see-who-dismembered-the-witness.)
I'm dedicated to binary because it makes all my numbers happy.
User avatar
SomeRandomPyro
 
Posts: 13
Joined: Thu Feb 25, 2010 6:26 pm UTC
Location: Freakin' Texas

Re: "Green Flash" Discussion

Postby MR.Mic » Wed Jul 14, 2010 6:02 am UTC

Here is a large version with as much upscale-artifact removal that I could manage in 20 minutes.
http://a.imageshack.us/img43/1545/bigkcd.jpg
MR.Mic
 
Posts: 1
Joined: Wed Jul 14, 2010 5:59 am UTC

Re: "Green Flash" Discussion

Postby mc-kreef » Wed Jul 14, 2010 6:03 am UTC

there is also a cross reference as TESLA is actually a green-car (climate friendlier)
another one, the black sea, doesn't refer to the bp-gulf-oil?
Americans fought 2 gulf wars for oil, and now finally it comes ;)
mc-kreef
 
Posts: 6
Joined: Mon Mar 08, 2010 9:21 am UTC

Re: "Green Flash" Discussion

Postby cr101 » Wed Jul 14, 2010 6:24 am UTC

GOOMHR! I watched Pirates of the Caribbean: At World's End like two days ago.

Also, beautiful. I can tell he spent a lot of time on this one, and it was definitely worth it. I like how the stick figures (for some reason, they are two-dimensional in my head) have real shading and silhouettes.
cr101
 
Posts: 7
Joined: Sun Jun 21, 2009 6:17 am UTC

Re: "Green Flash" Discussion

Postby superdansilverman » Wed Jul 14, 2010 6:30 am UTC

Of course I love the comic, but I do find it an unusual departure to find such a nice visual comic in a series that is always so dialogue-focused. It seems the opposite of what we expect: the text is a weak play on hat guy's antisocial tendencies. (almost every other xkcd dialouge is awesome. I'm not sure why this one is so bad). But here, the visuals are stunning (for randall. our graphical expectations here are pretty low.). Just saying, this one's kind of backwards.
superdansilverman
 
Posts: 1
Joined: Wed Jul 14, 2010 6:21 am UTC

Re: "Green Flash" Discussion

Postby londonanimal » Wed Jul 14, 2010 6:38 am UTC

I don't fully recall the facts / theory / terminology. Also I've been awake 18 hours, so bare with me :?

The light emitted by the sun is white, which we know is made up from the colours of the visible spectrum. The particles in the atmosphere diffract the light like a prism, hence the yellowish appearance of the sun, and the blue of the sky.

As the sun approaches the horizon the light travelling to our eyes has to travel through even more atmosphere, getting further diffracted, which gives the sun a red colour.

So the green flash must occur when all other light wavelengths have been defused by particles in the atmosphere. Which is strange, as I'm sure green light has a wavelength between red and blue, so surely it would also be dispersed by the atmosphere?

Maybe someone with their head more screwed on can enlighten me? :P
londonanimal
 
Posts: 3
Joined: Sat Jun 21, 2008 12:20 am UTC

Re: "Green Flash" Discussion

Postby Noslo » Wed Jul 14, 2010 7:52 am UTC

To quote wikipedia, "the reason for a green flash lies in the refraction of light in the atmosphere: light moves more slowly in the lower, denser air than the thinner air above, so sunlight rays follow paths that curve slightly, in the same direction as the curvature of the earth. Higher frequency light curves more than lower frequency light, so green/blue rays from the upper limb of the setting sun remain visible after the red rays are obstrructed by the curvature of the earth."

So basically, the earth's curvature blocks the red light and allows the green light to be seen.
"There are now an amusing number of posts defending weaponized xenon.
I think we hold strong opinions on the wrong things."
-asmodai
User avatar
Noslo
 
Posts: 9
Joined: Tue Jul 13, 2010 2:07 am UTC

Re: "Green Flash" Discussion

Postby sPOiDar » Wed Jul 14, 2010 8:40 am UTC

Unfortunately, upon waking up, the victim would find you sitting five meters from where you stole the Tesla, having run out of battery power.
sPOiDar
 
Posts: 3
Joined: Wed Jul 14, 2010 8:03 am UTC

Re: "Green Flash" Discussion

Postby dawolf » Wed Jul 14, 2010 9:04 am UTC

LesZedD4 wrote:I think i want a poster of this one for my bedroom, just without the text.

XKCD Sunset. perfect last thing to see at night, and first thing to see in the morning.


aye

interesting the two versions that have been cleaned up look quite different...
dawolf
 
Posts: 154
Joined: Thu Jan 07, 2010 9:21 pm UTC

Re: "Green Flash" Discussion

Postby Auliya » Wed Jul 14, 2010 9:54 am UTC

Get out of my head, Randall!

I've just learnt about the green flash by watching the fourth season of "Cuéntame cómo pasó".
Auliya
 
Posts: 8
Joined: Sun Feb 01, 2009 11:40 pm UTC

Re: "Green Flash" Discussion

Postby RogerB » Wed Jul 14, 2010 10:54 am UTC

sPOiDar wrote:Unfortunately, upon waking up, the victim would find you sitting five meters from where you stole the Tesla, having run out of battery power.

a) The only information I have about the Tesla's range is from its review on Top Gear. If this is your source then it's probably wrong. Don't believe anything Jeremy Clarkson tells you.
b) Things move on. These guys have built an electric car and driven it twice round the M25 (London's orbital motorway) on one charge, a distance of 250 miles. It also looks pretty cool. They're currently on an expedition to drive it down the whole of the Pan-American highway, Alaska to Tierra del Fuego, to demonstrate it's potential.

And no, neither of those puns were deliberate.
RogerB
 
Posts: 34
Joined: Tue Apr 21, 2009 12:20 pm UTC

Re: "Green Flash" Discussion

Postby Hawknc » Wed Jul 14, 2010 11:05 am UTC

244 miles or 393 km, according to the EPA, according to Wikipedia. (Minus whatever the protagonist would have used to drive to a point where they could see the sunset.)
User avatar
Hawknc
Oompa Loompa of SCIENCE!
 
Posts: 6974
Joined: Mon Oct 02, 2006 5:14 am UTC
Location: Melbourne, Australia

Re: "Green Flash" Discussion

Postby SirMustapha » Wed Jul 14, 2010 11:10 am UTC

I knew about the Green Flash because I watched the Eric Rohmer film Le Rayon Vert about an year ago. And now I see this comic! You know what that means?... YES!

Randall... get...s his ideas from Wikipedia, and I get them from interesting films.

Also, you can see better artwork if you browse Deviant Art for about 10 minutes. And yes, I know that place is filled to the brim with garbage.




Joke? What joke?
User avatar
SirMustapha
 
Posts: 1303
Joined: Mon Jul 21, 2008 6:07 pm UTC

Re: "Green Flash" Discussion

Postby JPatten » Wed Jul 14, 2010 11:12 am UTC

I have never seen the "Green flash". Though where I live I rarely get to see the sun set all the way to the horizon.
JPatten
 
Posts: 18
Joined: Tue Jul 13, 2010 5:39 pm UTC
Location: Southeast USA

Re: "Green Flash" Discussion

Postby E0000B6FAF25838 » Wed Jul 14, 2010 11:21 am UTC

Great visuals in this comic. I hope we don't see anymore of these in the future, though. I would think it would take up a lot of time and leave little room to think of actual content.
E0000B6FAF25838
 
Posts: 35
Joined: Thu Feb 25, 2010 4:26 am UTC

Re: "Green Flash" Discussion

Postby sPOiDar » Wed Jul 14, 2010 11:45 am UTC

RogerB wrote:a) The only information I have about the Tesla's range is from its review on Top Gear. If this is your source then it's probably wrong. Don't believe anything Jeremy Clarkson tells you.
b) Things move on. These guys have built an electric car and driven it twice round the M25 (London's orbital motorway) on one charge, a distance of 250 miles. It also looks pretty cool. They're currently on an expedition to drive it down the whole of the Pan-American highway, Alaska to Tierra del Fuego, to demonstrate it's potential.

It was a tongue-in-cheek comment - I actually live in Oz where the Internode guys set the distance record in a Roadster last year. It is still rather impractical when you're looking at multiples of that distance on petrol, and a 5-minute 'recharge' vs 5 hours or whatever the Tesla takes. And it's the recharge time that's key - the Roadster's certainly a fun toy if you have oodles of cash lying around, but that's all it is. Better batteries are holding back swathes of technical items that will alter the way we live, electric cars being but one.
sPOiDar
 
Posts: 3
Joined: Wed Jul 14, 2010 8:03 am UTC

Re: "Green Flash" Discussion

Postby scottgoblue314 » Wed Jul 14, 2010 12:13 pm UTC

Well if no one else is saying it, I will: "Nants ingonyama bagithi Baba, Sithi uhm ingonyama."

That's three moments in three days for me. Time to go watch The Lion King.
scottgoblue314
 
Posts: 25
Joined: Fri Oct 23, 2009 10:47 pm UTC

Re: "Green Flash" Discussion

Postby Moose Hole » Wed Jul 14, 2010 12:23 pm UTC

The text is white, which offends me and makes me think the comic is not funny.
Moose Hole
 
Posts: 400
Joined: Fri Jul 09, 2010 1:34 pm UTC

Re: "Green Flash" Discussion

Postby BioTube » Wed Jul 14, 2010 12:29 pm UTC

sPOiDar wrote:Better batteries are holding back swathes of technical items that will alter the way we live, electric cars being but one.
The lifespan issues of lithium-ion batteries are probably the most serious matter; few vehicles need that sort of maintenance cost over their entire lifespans. Of course, the things won't become popular until they have competitive truck and SUV models.
Frédéric Bastiat wrote:Government is the great fiction through which everybody endeavors to live at the expense of everybody else.
User avatar
BioTube
 
Posts: 362
Joined: Sat Apr 11, 2009 2:11 am UTC

Re: "Green Flash" Discussion

Postby jacog » Wed Jul 14, 2010 1:32 pm UTC

I'm offended that they named the car "Tesla".

If Nikola Tesla had built it, it would not need wheels, would go twice around the planet on a single charge, and come equipped with a particle cannon to vaporise offensive motorists.
Last edited by jacog on Wed Jul 14, 2010 2:36 pm UTC, edited 2 times in total.
User avatar
jacog
 
Posts: 56
Joined: Tue Dec 15, 2009 9:55 am UTC

Re: "Green Flash" Discussion

Postby Mo6eB » Wed Jul 14, 2010 1:35 pm UTC

LesZedD4 wrote:I think i want a poster of this one for my bedroom, just without the text.

XKCD Sunset. perfect last thing to see at night, and first thing to see in the morning.


Came here to say this. I would also like a text-free poster of this comic.
GENERATION \aleph_{1} : Whenever you wish, copy this into your sig on any forum and increase the generation to the next transfinite cardinal. Social experiment NOT over.
Image
User avatar
Mo6eB
 
Posts: 60
Joined: Sat Sep 22, 2007 9:20 pm UTC
Location: Karlsruhe, Germany

Re: "Green Flash" Discussion

Postby Cloud Walker » Wed Jul 14, 2010 1:58 pm UTC

I also think it's a green wine bottle, making BHG's "green flash" ambiguous.

And yay! A pretty comic for my birthday.
Because I have loved life, I shall have no sorrow to die. - Amelia Burr

I make pretty pictures!: Photography & Video Production
User avatar
Cloud Walker
 
Posts: 605
Joined: Fri Jun 12, 2009 3:37 am UTC
Location: Midwest, USA, Earth, Sol, Milky Way

Re: "Green Flash" Discussion

Postby ysth » Wed Jul 14, 2010 2:30 pm UTC

londonanimal wrote:Also I've been awake 18 hours, so bare with me :?

If it's all the same to you...

No.
A math joke: r = | |csc(θ)|+|sec(θ)| |-| |csc(θ)|-|sec(θ)| |
User avatar
ysth
 
Posts: 173
Joined: Wed Apr 11, 2007 7:21 pm UTC

Next

Return to Individual XKCD Comic Threads

Who is online

Users browsing this forum: Google [Bot], WanderingLinguist and 19 guests