Wednesday, November 29, 2006

Time Diolation

In the book I have been reading ( Universe on a T-shirt) we talked abit about Time Dilation... The experiment in the book was if you put a Clock at the bottom of Mount Everest, and one at the TOP of Mount Everest. The one at the bottom would be slower than the one at the top, cause the one at the bottom as more gravity forcing upon it, and the one at the top has less. So I wanted to find some more, so here are some experiments I found off of websites.... Link's will be at bottom of page. (have to give website credit to! :) )

"Time Dilation Experiments

The abandonment of the concept of universal time embodied in the time dilation expression is so counter-intuitive that one must look at the experiments to confirm this extraordinary prediction of special relativity. These are some of the experiments which confirm time dilation.


Muon Experiment

Non-Relativistic






Muon Experiment

Relativistic, Earth-Frame Observer






Kaivola Time Dilation Experiment

A precise measurement of time dilation was made in a double-photon experiment by Kaviola et al. in 1985. An atomic beam of neon atoms at v= 0.004c was excited by two lasers which were collinear with the beam and incident upon the atoms from opposite directions. The absorption frequencies for neon are shifted by both the Doppler effect and time dilation, with the Doppler shift being much larger. By measuring a double photon transition with the two lasers from opposite directions, the Doppler shift was canceled and the time dilation shift measured precisely . The measurement was made by measuring the beat frequency between the two tunable lasers. This experiment confirmed the expected time dilation within 4 parts in 100,000.


Atomic Fine Structure

One of the great successes of the quantum theory was the prediction of the energy levels of the hydrogen atom. When attempts were made to explain the fine structure of the hydrogen spectral lines, it was found that the splitting of the lines was in error by a factor of two. It was realized that relativistic time dilation must be used in calculating the frequencies, and calculations showed that this relativistic correction, called Thomas precession, was the factor of two which was needed for agreement with experiment.


Twin Paradox

The story is that one of a pair of twins leaves on a high speed space journey during which he travels at a large fraction of the speed of light while the other remains on the Earth. Because of time dilation, time is running more slowly in the spacecraft as seen by the earthbound twin and the traveling twin will find that the earthbound twin will be older upon return from the journey. The common question: Is this real? Would one twin really be younger?

The basic question about whether time dilation is real is settled by the muon experiment. The clear implication is that the traveling twin would indeed be younger, but the scenario is complicated by the fact that the traveling twin must be accelerated up to traveling speed, turned around, and decelerated again upon return to Earth. Accelerations are outside the realm of special relativity and require general relativity.

Despite the experimental difficulties, an experiment on a commercial airline confirms the existence of a time difference between ground observers and a reference frame moving with respect to them. "

You can find all of these and more at. http://hyperphysics.phy-astr.gsu.edu/hbase/relativ/twin.html#c3 Thank you Hyperphysics.phy for your help..

Also In next week's Post we will be talking about Quantom Theory!!!!!

Monday, November 20, 2006

Life And The Universe (Info about me, and what this blog is about)

Hi Since this is my first post I will explain a bit about me and what I would like to acomplish with this blog.
First my name is Daniel Hathaway, im 14, Live in Sherwood Park Alberta for almost all of my life. My dad is Rus Hathaway; Creator of. T.h.e.e (The Home Education Exchange), Cyber High (Online High School Campous), Datacast Solutions (Datevase Consultant, and Podcasting [ "Turning Info into Knowledge"]), Aspire (Online High school Campous). So as you can see my dad is quite sucsessfull, and he has sold all of those comanies except for Datacast Solutions. I am homeschooled, I am doing grade 9 L.A, and Math...But Science.. O science is mine! I am studying Quantum Physics, Newton Physics, and the universe..... In order to start my verge into the world of Quantum Physics, I am reading The Universe On A Tee-Shirt. It is an interesting book and I suggest to buy it and attempt to read it. So far in the book it has showed me that in the old time (700 bc- 100 ad) there was alot of confusion and lead to the birth of science... Some people think that the birth of science was when the first solar eclipse was predicted... But for now I am reading about the birth of modern science, with Newton, and Galileo. I think Galileo was one of the most sucsessfull scientist, without getting his highschool deploma.. But one of the most famous myths abotu Galileo was that he climbed to the top of the leaning tower of pisa (He lived at this time in Pita) and dropped a ball of coper and a ball of bone.. Same Size, and Weight, and they both hit the ground at the same time, which disproved the theory before of that things (objects and humans) Attract and Repeal from each other based on if they like the ground or not... E.G- if you drop an apple it it hits the ground, it didn't fall cause of gravity, it fell cause the apple likes the ground. If you tripped and fell face first into the ground, it was cause at that time your face loved the ground. Galileo proved gravity, also he witnessed one of the only 2 supernovas in recorded history... One in 1569 that Tycho Brah studied/Witnessed, and One in 1609 which Galileo and Johan Keppler witnessed....

My thery is tho after watching Down the rabbit whole. (good movie to rent explains alot) You are never really touching anything, and if you got down to the mere adams that the spaces between the adams, if yours changes to fit inbetween the spaces, you will become a whole and be able to walk throuhg a wall...


Until Thursday, so long and fair well.
Daniel

(p.s.- I will be blogging every Tuesday, and Thursday...Coments are welcome!!!)