Mart

Originally Posted by ecoli

 

There is always a need for commuication amoung animals.

Is this what language is primarily used for?

Depends on what you consider language to be. A useful start may be to think about what language is primarily used for.

Originally Posted by atinymonkey

the one thing you never see anything bring up is exactly why life has any moral worth in the first place

Any thoughts?

For how long did The Universe exist before the Big Bang? A rough value will do.

the only time it does get slow down is when it is passing through an object with density higher than vaccum, such as water, or air, but even that is by a fraction of a fraction of it's speed, which does not really matter.

Check the speed of light in water.

Can light or photons have a velocity?

Originally Posted by Swansont

No, this is not true.

You may be correct. However, an explanation would make it seem less like an edict.

Originally Posted by insane_alien

i was just meaning that it could be thought of that way

It seems a useful way to think about the problem. But you seem to be hinting that there are other ways.

Originally Posted by insane_alien

Where was the logic in that the guy SAVED the girls LIFE and he got the beating of a life time!

Say the girl had been a boy whose first name was Adolph.

Originally Posted by Janus

According to brother B, it is only the relative velocity that causes A to age less

And did A agree?

I was thinking of photons interacting with virtual particles.

insane_alien wrote

light travelling through a medium is only the average speed of the light by speed=distance/time but at any instance it is either going at c or is stored in the increased energy of an electron orbiting an atom.

Does this have any relevance to the finite speed of light in "empty" space?

Originally Posted by Lethalfang

When A experiences an acceleration or deacceleration to make a stop on earth, which is the exact same thing as gravity in relavity, A will experience time dilation.

Agreed. The relative velocity on its own can't make the age difference.

Robin Trower

Tony Iommi

Jimi Hendrix

Frank Zappa

Larry Coryell (early stuff)

Wes Montgomery

Favorite band: OzricTentacles (especially Erpland)

Originally Posted by Janus

I'd say that what "makes" the time difference depends on which twin you ask.

Thanks Janus. That's solved the problem. I wish I'd thought of that.

Originally Posted by Severian

I would rather say that the velocity makes the age difference and the acceleration lets you see it.

The relative velocity on its own can't make the age difference: the system is symmetrical. An asymmetry has to be introduced for the age difference to become actual.

Chr 7 is specified as beep in the ASCII system. It belongs in a group of other characters like Chr 2 (enable printer) or Chr 13 (new line). These are not displayable characters but cause something to happen.

The value of the relative velocity determines the age difference. There will be an age difference only if there is a difference in the type of motion (acceleration) of the twins.

Therefore, essentially, the twin's relative velocity generates the possibility of an age difference and a one-sided acceleration makes this an actuality. Is this basically correct?

But IMNSHO the original post by insane_alien wasn't about spelling. It was an attempt at a put-down of Masanov.

Maybe Masonov uses the same dictionary as I do.

According to my Oxford Dictionary P-H-A-N-T-A-S-Y is an appropriate spelling when talking about extravagant happenings.

You arrange a meeting somewhere in spacetime.

If both twins accelerate back to meet would there still be a difference in their ages?

There are many more ways for things to go wrong than right and most of us probably experience things going wrong on a daily basis but in a fairly ordinary way. Maybe bad news is good news in so far as it is likely to be fairly sensational and therefore can put the mundane stuff into a more realistic context.

Originally Posted by Severian

For example, if the observer is on the Earth's frame, the travelling twin will appear younger, but if he is travelling with the spacefaring twin, the twin on Earth will appear younger. If he is travelling at the average velocity of the 2 twins, they will appear to be the same age.

I am confused by the use of the word appear in (will appear younger) and when the twins are compared (one is younger). How do we get from appear to is?

Tom Mattson wroye

The value of the relative velocity determines the exact age difference. The faster the rocket travels, the greater the age disparity when it returns to Earth.

If there was no one-sided acceleration (the two didn't meet again) would the assymetrical aging still apply?