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HomeOff Topics › Mars in three days?
02-26-2016 12:36 PM  31 months agoPost 21
jharkin

rrApprentice

Holliston, MA - USA

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jharkin, and Nova
Hell call me a nerd... I love this stuff. When I was a kid I would read books about project Deadalus and stuff like that.
Its all about our perspective.
Correct - the perspective is he "relative part" It has something to do with the fact that the speed of light is constant regardless of your speed that makes time relative. ie light is beaming at at us both from the sun at the same speed. You stand still and I fly toward the sun at half light speed. The light should appear to be moving to me faster due to my moving toward the sun (remember all those "2 trains leave the station" word problems). However relativity says that I will see the light moving the same speed as a stationary person. the solution to that seeming paradox is to make time slower in my frame of reference (remembering speed is distance/time).

Or something like that.. I'm not a physicist I just get this stuff from books.
So a watch strapped to a beam of light will take 4.2 years.
And a watch strapped to my wrist would show 5 years if I traveled at .85 light speed ( assuming instant acceleration and deceleration )
I *think* the rule says that a watched strapped to a light beam wouldn't move at all.

A watch strapped to the wrist of the traveler would slow down and show 2.5 years

A watch on the wrist of somebody left behind on earth would show 4.2 years for the beam of light and 5 years for our traveller moving at .85C.

Correct about the part assuming instant acceleration and deceleration. What Ive read is that the reality is that with a rocket engine accelerating at one earth gravity it takes just over a year to reach a high % of lightspeed.

-Jeremy
Whiplash-G
Helix 700G
T-Rex 450 fbl conversion
alot of planks

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02-26-2016 12:56 PM  31 months agoPost 22
Dennis (RIP)

rrApprentice

Oregon

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If a black hole does not even let light escape, doesn't light get sucked into the black hole faster than the speed of light?

Seems logical.

But, is it?

Liberty once lost, is lost forever.

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02-26-2016 02:10 PM  31 months agoPost 23
GyroFreak

rrProfessor

Orlando Florida ...28N 81W

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Seems logical.
Trouble is, there is no logic when looking at relativistic orders of time dilution verses light speed.

I think about the hereafter. I go somewhere to get something, then wonder what I'm here after ?

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02-26-2016 02:34 PM  31 months agoPost 24
Dennis (RIP)

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Oregon

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Way above my pay grade.

But still fascinating reading.

Liberty once lost, is lost forever.

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02-29-2016 06:53 PM  31 months agoPost 25
utahbob

rrVeteran

St. George Utah

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fun stuff to think about..
But I doubt that when the time comes to fend off an asteriod on a collision course with earth; we won't even be able to afford\and or get enough support from other countries to accomplish that..cause of all the resources being wasted to deal with the troublemakers on this rock!

I do a great decending funnel!

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