A little physics thing to think about - GoFuckYourself.com

Myst · 04-27-2005, 07:30 AM

A train is approaching you at 30m/s
The train conductor shines a flashlight at you and throws a ball at you, speed of the light is 3x10^8m/s, speed of the ball is 10m/s

what is the apparant speed of
a) the ball
b) the light

from your perspective?

the ball speed is 40m/s
the light speed is still 3x10^8 m/s (not 3x10^8 m/s + 40m/s)

back to work!

Meta Ridley · 04-27-2005, 07:35 AM

Thats the crazy thing about light, it's always going the same speed from everyones perspective.
I read the reason for this once but can't remember ,, fill me in please.

arnette · 04-27-2005, 07:35 AM

well, the speed of light would be 3x10^8m/s (although it would be slower in a real situation)

and assuming your speed of the ball is relative to the train conductor, and towards you, it would be 40m/s

what is the point of this?

GatorB · 04-27-2005, 07:37 AM

Not to sound stupid but if the train is going 30m/s and the ball is going 10m/s wouldn't the train run into the ball?

Meta Ridley · 04-27-2005, 07:38 AM

Quote:

Originally Posted by arnette

well, the speed of light would be 3x10^8m/s (although it would be slower in a real situation)

and assuming your speed of the ball is relative to the train conductor, and towards you, it would be 40m/s

what is the point of this?

The point is if you are traveling towards someone and 10,000 mph and throw a ball in the same direction at 50mph,, the ball will come at that person at 50 mph plus 10,000 mph for a total of 10,050 mph.
This DOES NOT HAPPEN with light,, its always traveling at the same speed no matter what perspective you are measuring it from.

Meta Ridley · 04-27-2005, 07:40 AM

Quote:

Originally Posted by GatorB

Not to sound stupid but if the train is going 30m/s and the ball is going 10m/s wouldn't the train run into the ball?

Not if you throw it from the train

GatorB · 04-27-2005, 07:40 AM

Quote:

Originally Posted by Meta Ridley

Not if you throw it from the train

The guys teh trian is coming AT YOU and he is throwing the ball AT YOU. perhaps he needs to be more clear.

Meta Ridley · 04-27-2005, 07:42 AM

Quote:

Originally Posted by GatorB

The guys teh trian is coming AT YOU and he is throwing the ball AT YOU. perhaps he needs to be more clear.

What dont you understand? He makes perfect sense:

Scott McD · 04-27-2005, 07:43 AM

This is why i stick to porn...

GatorB · 04-27-2005, 07:44 AM

Quote:

Originally Posted by Meta Ridley

What dont you understand? He makes perfect sense

I guess my 130 IQ is not enough to grasp it. Maybe Mensa should rescind my membership.

arnette · 04-27-2005, 07:46 AM

Quote:

Originally Posted by Meta Ridley

The point is if you are traveling towards someone and 10,000 mph and throw a ball in the same direction at 50mph,, the ball will come at that person at 50 mph plus 10,000 mph for a total of 10,050 mph.
This DOES NOT HAPPEN with light,, its always traveling at the same speed no matter what perspective you are measuring it from.

yeah, thats exactly what i said

Meta Ridley · 04-27-2005, 07:46 AM

Quote:

Originally Posted by GatorB

I guess my 130 IQ is not enough to grasp it. Maybe Mensa should rescind my membership.

I guess so.
It's pretty simple.
A train comes at you at 30 m/s, the conductor throws a ball at you at 10 m/s.

The ball move at you at 40 m/s

Whats so difficult?

GatorB · 04-27-2005, 07:48 AM

Quote:

Originally Posted by Meta Ridley

I guess so.
It's pretty simple.
A train comes at you at 30 m/s, the conductor throws a ball at you at 10 m/s.

The ball move at you at 40 m/s

Whats so difficult?

And this has what to do with light?

Meta Ridley · 04-27-2005, 07:52 AM

Quote:

Originally Posted by GatorB

And this has what to do with light?

Ok to make this very simple lets just assume light travels at 10 m/s.

A train comes at you at 30 m/s, the conductor shines a light at you at 10 m/s.

You would assume the light would be traveling to you at 40 m/s like the ball, or sound, or anything else.

But it is still only traveling to you at 10 m/s.

If you don't see what the big deal is that's fine but this is one of the biggest scientific discoveries of the century.

GatorB · 04-27-2005, 07:57 AM

Quote:

Originally Posted by Meta Ridley

Ok to make this very simple lets just assume light travels at 10 m/s.

A train comes at you at 30 m/s, the conductor shines a light at you at 10 m/s.

You would assume the light would be traveling to you at 40 m/s like the ball, or sound, or anything else.

But it is still only traveling to you at 10 m/s.

If you don't see what the big deal is that's fine but this is one of the biggest scientific discoveries of the century.

No I don't. maybe I get it too much to see the mystery. Also he's not throwing the light at you like he is the ball. light would be travling on it own inertia whereas the ball would be using the inertial of both the train the conductors arm. Of course I could be wrong.

Meta Ridley · 04-27-2005, 07:58 AM

Quote:

Originally Posted by GatorB

No I don't. maybe I get it too much to see the mystery. Also he's not throwing the light at you like he is the ball. light would be travling on it own inertia whereas the ball would be using the inertial of both the train the conductors arm. Of course I could be wrong.

Ok you just don't get it I give up.

GatorB · 04-27-2005, 08:03 AM

Quote:

Originally Posted by Meta Ridley

Ok you just don't get it I give up.

I do get it wiseass. Since you like brainteasers try these out for size

http://www.mensa.org/workout2.php?

I got 26.

http://www.highiqsociety.org/noflash...iqtests.htm?IQ

don't remember the score but was enough to get in.

Meta Ridley · 04-27-2005, 08:06 AM

Quote:

Originally Posted by GatorB

I do get it wiseass. Since you like brainteasers try these out for size

http://www.mensa.org/workout2.php?

I got 26.

http://www.highiqsociety.org/noflash...iqtests.htm?IQ

don't remember the score but was enough to get in.

Dude big fucking deal Ive taken this test and many like it. I aced the mensa pre test and have been asked to to join many times, but I realized dont need to pay some group an annual fee so I can brag about how smart I am on internet forums. You almost have to be a dumbass to pay someone to tell people you are smart.
Get over yourself

Pleasurepays · 04-27-2005, 08:12 AM

Quote:

Originally Posted by GatorB

I guess my 130 IQ is not enough to grasp it. Maybe Mensa should rescind my membership.

funny you brag about intelligence and can't grasp the simple fact that the speed of light is always constant.

GatorB · 04-27-2005, 08:14 AM

Quote:

Originally Posted by Meta Ridley

Dude big fucking deal Ive taken this test and many like it. I aced the mensa pre test and have been asked to to join many times, but I realized dont need to pay some group an annual fee so I can brag about how smart I am on internet forums. You almost have to be a dumbass to pay someone to tell people you are smart.
Get over yourself

Sorry, but it's YOU that needs to get over yourself. WHO is it that is telling people "you don't get it" and "I'll simplifly it for you"? Um.... let's see...... oh it's YOU. Quit think you know everything and telling peole who DO IN FACT GET IT that they don't. It 's YOU that needs to get his jollies showing everyone how much smarter they are since arcording to you YOU are the only one that "gets it".

GatorB · 04-27-2005, 08:16 AM

Quote:

Originally Posted by Pleasurepays

funny you brag about intelligence and can't grasp the simple fact that the speed of light is always constant.

You didn't read my post very clearly did you? And I didn't brag. Sorry that was the other guy. Only HE "gets it" and has to "simplify" it for others. If that's not bragging well I guess I am dumb.

Meta Ridley · 04-27-2005, 08:23 AM

Quote:

Originally Posted by GatorB

Sorry, but it's YOU that needs to get over yourself. WHO is it that is telling people "you don't get it" and "I'll simplifly it for you"? Um.... let's see...... oh it's YOU. Quit think you know everything and telling peole who DO IN FACT GET IT that they don't. It 's YOU that needs to get his jollies showing everyone how much smarter they are since arcording to you YOU are the only one that "gets it".

You're amusing at best.

Meta Ridley · 04-27-2005, 08:24 AM

Quote:

Originally Posted by GatorB

You didn't read my post very clearly did you? And I didn't brag. Sorry that was the other guy. Only HE "gets it" and has to "simplify" it for others. If that's not bragging well I guess I am dumb.

No dipshit,,,you got it wrong again,,,,, EVERYONE else gets it, and I have to dumb it down for YOU

Drake · 04-27-2005, 08:27 AM

I genuinely wish I knew how to answer questions like that

GatorB · 04-27-2005, 08:29 AM

Quote:

Originally Posted by Meta Ridley

You're amusing at best.

And you're not at all. For someone who is supposedly so smart you are a wiseass when someone is TRYING to have an INTELLIGENT coversation with you. So if you want to be a asshole go ahead and knock yourself out, I have better things to do with my time. Please let me know when you wish to talk like an adult. Personally I think it fucking retarded to start talking about stuff like this then insult people who post replies liek you're an asshole, unless that was you're goal from the get go. If so, then you have achieved your goal. Like I said well talk more when you're ready to grow up. Until then see ya!

GatorB · 04-27-2005, 08:31 AM

Quote:

Originally Posted by Meta Ridley

No dipshit,,,you got it wrong again,,,,, EVERYONE else gets it, and I have to dumb it down for YOU

I got it, I got it, fucking MORON. Geez you are too stupid to even get that. I'm sure a 5 year old is AMAZED how 2+2=4. A 10 year old should not. You're the 10 year old that is still AMAZED by 2+2=4.

GatorB · 04-27-2005, 08:33 AM

Quote:

Originally Posted by Mike33

I genuinely wish I knew how to answer questions like that

I guess he thinks you're moron too. Perhaps he'll simplify it even more since he's the next Stephen Fucking Hawking.

Meta Ridley · 04-27-2005, 08:35 AM

Quote:

Originally Posted by GatorB

I got it, I got it, fucking MORON. Geez you are too stupid to even get that. I'm sure a 5 year old is AMAZED how 2+2=4. A 10 year old should not. You're the 10 year old that is still AMAZED by 2+2=4.

Terrible analogy.

Meta Ridley · 04-27-2005, 08:37 AM

Quote:

Originally Posted by GatorB

I guess he thinks you're moron too. Perhaps he'll simplify it even more since he's the next Stephen Fucking Hawking.

I never said anyone was a moron,,, I was trying to explain it to you cause youre first post sounded like you had no clue,, then you come in bragging about you mediocre IQ and mensa, haha give me a break.

Myst · 04-27-2005, 08:37 AM

Quote:

Originally Posted by GatorB

I got it, I got it, fucking MORON. Geez you are too stupid to even get that. I'm sure a 5 year old is AMAZED how 2+2=4. A 10 year old should not. You're the 10 year old that is still AMAZED by 2+2=4.

the amazing thing about what i posted is that in regarding light
2+2 = 2

thats whats amazing
as an innocent bystander, ill throw in my 2 cents
gator, you arent quite grasping whats being said here..

lets say the speed of light was 100m/s. if youre in a train (10/ms) and u throw a ball at someone in front of u while on the train (the person is say on the train tracks in front of the train), that ball will come at him at 20m/s (10+10). if you shine light at him, that light will not come at him at 100+10=110m/s, itll come at him at 100m/s

Meta Ridley · 04-27-2005, 08:38 AM

Quote:

Originally Posted by Myst

the amazing thing about what i posted is that in regarding light
2+2 = 2

thats whats amazing

Much better analogy

swedguy · 04-27-2005, 08:45 AM

This thread turned into an ugly dick swinging competition pretty fast.

GatorB · 04-27-2005, 08:46 AM

Quote:

Originally Posted by Myst

the amazing thing about what i posted is that in regarding light
2+2 = 2

thats whats amazing

I have no beef with you. The other dude is a jerk and he is on IGNORE so I don't know what his 2 posts above you are about and I really don't care. Once again I get it everyone else can think what they want. Mr Smartypants think he's fucking Einstein and needs to show how smart he is by "explaining" things to the "ignorant".

When I was in school and I had to do math problems the way the book said to do them I had a hard time. I had better quicker ways of solving the problem and mostly in my head. Now when I had to explain HOW I did it or show my work I couldn't. I honestly could not show in a way that would make any sense to anyone else why my way worked. So if I am deficient in anything it's my ability to articulate myself in a way so that people "get it" when I say something. Some do others just act like jerks.

Meta Ridley · 04-27-2005, 09:43 AM

Quote:

Originally Posted by GatorB

Mr Smartypants think he's fucking Einstein and needs to show how smart he is by "explaining" things to the "ignorant".

You called me Mr. Smartypants.

And who the hell are you quoting BTW?

SpaceAce · 04-27-2005, 09:56 AM

Quote:

Originally Posted by GatorB

No I don't. maybe I get it too much to see the mystery. Also he's not throwing the light at you like he is the ball. light would be travling on it own inertia whereas the ball would be using the inertial of both the train the conductors arm. Of course I could be wrong.

Light doesn't have inertia and the speed of the ball thrown from the train has nothing to do with either objects' inertia. The relevant factor here is velocity, not inertia or momentum. When you throw the ball at 10m/s, the ball is already moving at 30m/s relative to the stationary observer. So, you are adding 10m/s to the 30m/s the ball is already travelling at.

Light, however, always appears to be moving at the same speed no matter what the motion of the observer. For instance, if you are going 35MPH and someone passes you at 40MPH, the person passing you appears to be going 5MPH. However, if you are travelling 35MPH and a beam of light were to pass you, the beam of light would appear to be going 670,616,629 miles per hour, not 670,616,629-35 miles per hour. The speed of light in a vacuum is constant and your speed relative to the light has no effect on the light's apparent speed.

SpaceAce

GatorB · 04-27-2005, 10:06 AM

Quote:

Originally Posted by SpaceAce

Light, however, always appears to be moving at the same speed no matter what the motion of the observer. For instance, if you are going 35MPH and someone passes you at 40MPH, the person passing you appears to be going 5MPH. However, if you are travelling 35MPH and a beam of light were to pass you, the beam of light would appear to be going 670,616,629 miles per hour, not 670,616,629-35 miles per hour. The speed of light in a vacuum is constant and your speed relative to the light has no effect on the light's apparent speed.

SpaceAce

So if you were traveling 5 MPH slower than the speed of light the light passing you would appear to be going 670,616,629 miles per hour faster than you?

Myst · 04-27-2005, 10:28 AM

Quote:

Originally Posted by GatorB

So if you were traveling 5 MPH slower than the speed of light the light passing you would appear to be going 670,616,629 miles per hour faster than you?

the light would still appear to be going away from u at 670,616,629 miles per hour (fuck the english system aka miles is retarded.. )

its always always always 3x10^8 m/s.. to compensate, time changes, speed of light does not if u have different reference frames

if a man is travelling at the speed of light - 1m/s, shining light from a flashlight, he will see that light coming out at 3x10^8m/s.

a person watching the man travel shining his light will also see light coming out at 3x10^8, not 3x10^8 + 3x10^8 - 1m/s

but time will slow down for you, be fast for him

04-27-2005, 07:30 AM	#1
Myst Confirmed User Join Date: Feb 2004 Location: Alberta, Canada Posts: 4,707	A little physics thing to think about A train is approaching you at 30m/s The train conductor shines a flashlight at you and throws a ball at you, speed of the light is 3x10^8m/s, speed of the ball is 10m/s what is the apparant speed of a) the ball b) the light from your perspective? the ball speed is 40m/s the light speed is still 3x10^8 m/s (not 3x10^8 m/s + 40m/s) back to work! __________________ ICQ: 298-523-037 Last edited by Myst; 04-27-2005 at 07:32 AM..

04-27-2005, 07:35 AM	#2
Meta Ridley Confirmed User Join Date: Sep 2003 Location: The land of ruleface and kickass Posts: 3,433	Thats the crazy thing about light, it's always going the same speed from everyones perspective. I read the reason for this once but can't remember ,, fill me in please. __________________ [email protected]

04-27-2005, 07:43 AM	#9
Scott McD Too lazy to set a custom title Join Date: Nov 2002 Location: Glasgow, Scotland Posts: 67,795	This is why i stick to porn... __________________ I Buy My High Quality Traffic Here, You Should Too!

04-27-2005, 07:35 AM	#3
arnette Confirmed User Join Date: Feb 2005 Posts: 283	well, the speed of light would be 3x10^8m/s (although it would be slower in a real situation) and assuming your speed of the ball is relative to the train conductor, and towards you, it would be 40m/s what is the point of this?

04-27-2005, 07:37 AM	#4
GatorB The Demon & 12clicks Industry Role: Join Date: Oct 2001 Location: SallyRand is a FAGGOT Posts: 18,208	Not to sound stupid but if the train is going 30m/s and the ball is going 10m/s wouldn't the train run into the ball?

04-27-2005, 08:27 AM	#24
Drake Hello world! Industry Role: Join Date: Mar 2003 Posts: 12,508	I genuinely wish I knew how to answer questions like that

04-27-2005, 08:45 AM	#32
swedguy Confirmed User Industry Role: Join Date: Jan 2002 Posts: 7,981	This thread turned into an ugly dick swinging competition pretty fast.