You Can't Travel Back in Time, Scientists Say

wei_loon5063

Originally posted by paparock at 21-5-2007 12:15 AM
The concept of wormhole for space travel is much easier to grasp than time travelling machine..

It is the same..... same theory.... different dimensions

ussopp

my fren made a joke that time machine has already exist...

its his own toto(tilam toto)....

because he sleep so so long,
when he wakes up, he always find his hair look like einstein's  and  he looks older and he is in the future...

he said,ussually he travels 12 hours to the future....but he claim his time machine never bring him back home...

what a dissapoint....

when i look at his simple and old toto...i just laugh...

[ Last edited by  ussopp at 10-6-2007 12:00 AM ]

Hi newbie here..

it is infact an interesting topic!
read all the post but understand a few.. ehehhe..

long time ago, one of my teacher told me a theory (which is never been proven, of course) and i dont know where he got it.here it it :

let say some one travel from point A to point B.
letsay it is 100 km.
if he travel 100 km/h, he will reach point B in an hour.
if he travel a litle bit faster, let say 200km/h, he will reach in 30 minutes

if he tarvel faster than that, he will reach let say 10 min.
more speed= less time.
untill one point a certain velocity he can reach at point B in no time (0 second)
and if he increase the velocity higher than taht point, the time will become minus.
this is my teacher told me about going back to the past.

is this theory same as the relitivity theory?

maybe what we should have is a time machine name DeLorean..
haha..

"think Mcfly, think!!"
"Owh, Mcfly, u didnt think four dimensionally.."

cipanbakar

speed is finite 300k km/s. when u move nearly light speed limit, special relativity said the time needed to reach ur destination will decrease according to lorentz factor and i think the highest is up to 7 times. this happened due to space shrinkage although the space 'feel' actually it is ur clock that tick slower. from ur vintage point, it is the 'space' that is moving and not u. just imagine an object move at high speed. u will realise its length shorten. just apply dis to space too

johnconan

kenapalah korang ni nak susah2 bina alat time machine...

nak tengok kejadian lepas? Belajar je astral travel. Katakan korang nak tengok peristiwa melaka diserang portugis. Jadi imej peperangan tersebut dah bergerak meninggalkan bumi sekitar 496 tahun cahaya dari Bumi. So dalam alam astral, korang bleh travel /bergerak melebihi kelajuan cahaya. Bergerak sebuah tempat sejauh 496 tahun cahaya, pastu halakan diri korang mengadap arah Bumi, so korang bleh tengok imej peperangan tersebut. Semasa korang dalam astral, vibration rate korang sama ngan vibration rate cahaja. So korang bagaikan sebuah alat penerima utk terima imej tersebut....

x percaya? x try mana tahu x bleh...

p/s barulah saya faham apa itu Akashic Record...

[ Last edited by  johnconan at 18-6-2007 12:24 PM ]

aku_EnSeM

Originally posted by LabRat at 13-6-2007 02:35 PM
Hi newbie here..

it is infact an interesting topic!
read all the post but understand a few.. ehehhe..

long time ago, one of my teacher told me a theory (which is never been proven, of c ...

if your teacher said that this theory was devised long time ago, it is logical because relativity just appeared in the past century. If there was no relativity, the theory indeded could capture public's and scientists' interest.

However, relativity puts a limit to the velocity of an object. Thus, this theory fails instantly.

am i right?

Originally posted by johnconan at 18-6-2007 12:23 PM
kenapalah korang ni nak susah2 bina alat time machine...

nak tengok kejadian lepas? Belajar je astral travel. Katakan korang nak tengok peristiwa melaka diserang portugis. Jadi imej peperangan ...

hahah..
i dont want to see melaka diserang portugis.

i just want to go bck 20 years, put some money in several mutual fund and take it out tomorrow. hahaha
(but if only i could travel to the future, better take it out 50 years later.. hahaha)

damn. this is almost doraemon man..

Originally posted by aku_EnSeM at 19-6-2007 01:35 PM


if your teacher said that this theory was devised long time ago, it is logical because relativity just appeared in the past century. If there was no relativity, the theory indeded could captu ...

absolutely rite mr ensem.
i think only energy can travel that fast.

cipanbakar

only space can 'move' faster than light

ischae

are u guys talking about superluminal theories? :hmm:

ussopp

Originally posted by LabRat at 13-6-2007 02:35 PM
Hi newbie here..

it is infact an interesting topic!
read all the post but understand a few.. ehehhe..

long time ago, one of my teacher told me a theory (which is never been proven, of c ...

hehe, labrat, first I read this post, I thought your my  skool fren...
becoz i rememer when i nwas form 1 , i have been discussing a time machine theory to the past exactly like this with my school mate...
I was  so so bersemangat at that time ...

but like Aku_hensem said below,  demolished everythingl.....hehe...

if your teacher said that this theory was devised long time ago, it is logical because relativity just appeared in the past century. If there was no relativity, the theory indeded could capture public's and scientists' interest.

However, relativity puts a limit to the velocity of an object. Thus, this theory fails instantly.

am i right?

if there is a  faster speed than electromagnetic wave.....;).hmmm

ischae

i can't see anything solid to proof this time travel thing

other than wat is said in AL-Quran (the 4th pillar of faith of Islam)

yes nothing is impossible at this moment

electromagnetic wave moves faster than light

alright i can fathom that

but mass/physical body at certain high speed

will burst out due to extreme pressure oo whatever

i've been to MIT Conversion where we discussed about this theory

Can We Travel Back In Time .. of course

there were two diversed group  and i didnt belong to any hahaha

from that convention, ermm i could conclude that

we, human can't travel back in time

but who knows .. only ALLAH knows aight

Kun fayakun.. then we're now in yr 2020

oh btw, am i considered as time traveller if

today i'm at my current place, dated july 21

but as i reached my destination, it's already july 22? :hmm: :lol

just my two cents .. maybe i should look for videos that i recorded during that convention

and share them with u :hatdown:

cipanbakar

Originally posted by ischae at 23-6-2007 08:42 AM
i can't see anything solid to proof this time travel thing

other than wat is said in AL-Quran (the 4th pillar of faith of Islam)

yes nothing is impossible at this moment

electromagnetic wave moves faster than light...

hello cik barton :love:

electromagnetic wave tuh light la cuma light yg kite nampak tuh electromagnetic wave ngan wavelength hanya antara 400 hingga 700 nanometer. gamma ray, x ray, radio pun light aka electromagnetive wave gak tp tak nampak sebab di luar julat frekuensi mata manusia

cipanbakar

Originally posted by aku_EnSeM at 27-4-2007 05:55 PM

Emm... i'm not trying to oppose anybody... i'm being neutral rite here, alright??

i'm very interested in this relativity things... but suddenly i found a law (don't know whether it is valid or not), called the alice law, that there are some weaknesses in einstein's theory of relativity...

and it says, there is no such 'time dilation' thing. and for the atomic clock experiment. it says that near the earth's surface, the gravitational attraction is higher than that of higher place, and this somehow causes the time recorded by the clocks is different...

hmmm.... can anybody help me to explain this? or perhaps you want to have a deeper look on the law itself. it is in the form of a computer programme, and is downloadable for free on the net... i don't sure from which website did i get this, but i think its www.download.com. try the 'physics' keyword, or any other relevant keywords. if it is not in there, it is in www.tucows.com. i think the programme is displayed by 'alice', or something like that..

i dont know the alice thing but besides atomic clock experiment(its no longer experiment since its already a practise to adjust the atomic clock whenever flown from one place to another), they also test it for muon. they accelerate muon nearly light speed and its decay longer than normal according to lorentz factor (no gravity difference here right)..  yeah suddently i remember the formula for lorentz factor. it is 1/[squareroot(1-vE2/cE2)] v is object speed, c light speed and E exponent. so let say the muon accelerate at 0.9999 light speed then put into the equation and solve it. whatever number come is the time dilation. if 10, then that mean its life longer 10 times. and experimentally it pass with fly colour

ischae

thanks :hatdown:

i have limited knowledge in physics .. sorry

so can we travel back in time?

what say u?

cipanbakar

Originally posted by wei_loon5063 at 20-5-2007 11:15 PM







This worm hole impressed me alot...
A lot of people seen it but do not know what it is.
It is all over science fiction movies.
First the collapsed star form infinite density by contracting space into emptiness.

then the infinite mass form endless gravitational well.

hei wei loon, long time no see. me busy with akademi fantasia lah. many2 hot chicks

back to topic:

white hole? i can't get it. it totally beyond me. black hole is real. we see it, we realise it and it happen everywhere. it is due to gravity. we can make it either. but what is white hole? what's the fundamental behind it?

let say if we want to make a black hole. its happen due to strong gravity, not even light can escape from it. actually i can understand it by referring to escape velocity. if any object want to escape from a planet or star, it must overcome the escape velocity. for earth, it is around 11km/s. so all satelite launch must pass this speed at once. so if we want to make the earth as a blackhole, we must make the escape velocity higher than the speed of light. the formula for escape velocity is V= squareroot (2GM/R) with constant G = 6.67E-11, M mass in kg and R jejari in m (what u call it in english? forget loh). for earth V= squareroot (2 X 6.67E-11 X 6E24 / 7E6) and i think the answer would be few milimeters. so if earth compressed to a few milimiters we can call it a blackhole(but the force needed only provided by supernova)

for wormhole, its more doesn't make sense. although we call it blackhole but there is no hole. how come a blackhole without a hole can send u to another hole? neutron star and blackhole is just an object with high density which i think should be sphere mabye, but what's more important is it is not a hole. even after taking general relativity into consideration, i still can't get it. according to GM, the massive object curve the space. i can imagine it and for me it just like a house surrounding by drain. but there is still no hole! all mass sucked accrete around the blackhole and not just send to another hole. my 2 kupang

[ Last edited by  cipanbakar at 23-6-2007 10:05 PM ]

cipanbakar

Originally posted by ischae at 23-6-2007 09:58 PM
thanks :hatdown:

i have limited knowledge in physics .. sorry

so can we travel back in time?

what say u?

why not. a century ago people also never imagine can travel to pluto

i will invent the greatest telescope and this telescope can point and fokus to any star. and this star is like a supermirror. it send an image from earth. let say i want to see what happen 4 years ago(on earth la), i will point my supertelescope to alpha centauri and since it is 4 light years from earth, whatever i watch on the mirror(the star) is what happen four years ago. my supertelescope not onli view earth from distance, it also can focus to any country, house and even toilet. there it is my super telivision!!

[ Last edited by  cipanbakar at 23-6-2007 10:14 PM ]

ischae

alright .. now i can get a gist of wat u guys were talking about here :lol

wakakakkaka..gatal ko cipan

ey gud luck alright .. nnti dh bjaye jgn luferkan aku

cipanbakar

Originally posted by ischae at 23-6-2007 10:18 PM
alright .. now i can get a gist of wat u guys were talking about here :lol

wakakakkaka..gatal ko cipan

ey gud luck alright .. nnti dh bjaye jgn luferkan aku

ko orang pertama yg akan aku lupakan :nana:

ischae

aku xnk kasi ko 1st komen