funkey100
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Bottle Rocketeer
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Question about Speed of Light and Relativity
funkey100 replied to funkey100's topic in Science & Spaceflight
Sorry, but I'm new to all of this. The 3rd object will change speed relative to the Earth and Sun because of the time dilation (I get this, as anything that's going at a relative speed greater than 0 will be slower than the other object). But why would that change not last without contraction? -
Question about Speed of Light and Relativity
funkey100 replied to funkey100's topic in Science & Spaceflight
So I think I get it now. Since time slows down in the object (let's say by half), since c is distance per time, it would appear as the other object would be going half that speed, or 0.6c. But, in the point of impact they would still appear to be going 0.6c each. But then what is the contraction for? The slower time makes it so the person inside the bus couldn't achieve that speed already, what difference does the contraction make? -
My question is, what is the speed of light relative to? I did some Googling and the answer is everything. But I don't quite understand. If I'm on Earth and the Sun is directly above me, and I have a laser and shoot a beam of light to Earth's pro- and retrograde, it would be moving c for me since it's relative to everything, included me. That will mean that relative for the sun its going at c+ and c- Earth's speed respectively. I'm slightly (really) confused. Can some one please help me understand this? Also, if two objects were moving at each other at (relative to their point of impact) 0.60c, and I were on one of them, then it would be moving 1.2c relative to me which is impossible. P.S., You can see I'm new to all this relativity thing but I want to understand. EDIT: I understand the bus moving and one km/h less than c and I walked in it two km/h I couldn't go faster than c because special relativity makes the bus and everything in it contract relative to the outside (and everything outside to contract relative to the inside). EDIT: I'm trying to read the Wikipedia article on special relativity.
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Does nobody else have my problem? I'll try to get a pic soon. EDIT: Here it is. It's the same for vertical but the different text.
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Both VAB and SPH.
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Hey, I have a problem that whenever I press tab or v to switch modes it switches and switches back instantly. Both texts that say VAB/SPH, Vertical off/Vertical On appear at the same place and time. Any help?
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I've seen Delta V maps that show how much you need to orbit Kerbin, get out of it, encounter another body, orbit it and land. Yet I haven't seen too much on what you need to launch from another body and get back to Kerbin. Anyone have a map or list or chart? I mainly need this for my advanced Mun rocket but it would be nice if I could get the other planets and moons too.