Teacher problems

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(03-23-2013 09:25 AM)TheGoldenGriffin Wrote:  There are actually people and even scientists that don't believe in dark matter like you. General relativity passed many many tests and experiments and it is very accurate so it doesn't need modification. Scientists that wanted to disprove it have failed. There are scientists that are thinking up modifications for general relativity and testing them because they don't believe that dark matter exists. Its like if someone gives you an orange. It looks like an orange, it feels like an orange, its the right size, shape, color, weight. Then later, you are able to do more tests. It tastes like an orange, it has the right kind of flesh, it has orange seeds in it, it has all the specific parts of an orange, has all the right chemicals in the juice, you even test its DNA and learn its orange DNA. This is like with general reletivity. Its been tested many times and all the results show its accurate. Then you smell the orange and it smells like an apple. An apple. You'd be like, "How is this possible?! It looks like an orange, feels like an orange, tastes right, shape, size, color, weight, seeds, chemicals, and DNA is right but it smells like an orange?! Is there something we don't know about oranges?!" When the scientist realized that the stars were moving to fast, they were shocked. According to general relativity, the stars shouldn't be moving that fast. When calculating the masses of galaxies, 80%-90% of it's mass is missing. Where did the extra mass come from? You have two choices to make, either general relativity is wrong and that you have to modify it, or there is else there we don't know about thats causing it. Just like with the orange. Either what you know about oranges is wrong and you have to rethink about what an orange really is, or what you know about oranges is right and that something is causing it to smell like an apple- like an apple scented chemical on the fruit. Because of all the proof that it is an orange, there is probably something on the orange that is causing the apple smell. Same thing with the galaxy
problem, after all the verifications that general relativity is accurate, there is probably something else thats adding all that extra mass that isn't emtting any electromagnetic radiation or interfering with it- dark matter. Of course, there are scientists that deny dark matter exists and think that general relativity is inaccurate and are trying to think of a better theory. But because of all the proof, most scientist think dark matter does exist and are trying to learn more about it.

Lol like the orange metaphor

Thought I should point/add that though relativity is accurate, as its passed every experiment, the current math can't explain it. Tensor calculus is the best way to explain it but even that doesn't give an accurate viewpoint. Also you last sentence isn't accurate (I think your just being simple for forum purposes though). Physicists aren't really doing, shall we say experiments on dark matter yet. You need to make sure that the branch of mathematics will offer the correct viewpoint too. remember, experiments are expensive and you don't want to fuck them up first time. Tensor calculus has that potential. The math is the main reason why scientist split into the two sides. Some take the math not explaining much as a sign of dark matter, others believe that relativity must be modified because of it. I don't know but I think a new branch of calculus has to be invented at this point.

Btw I barely know anything about tensor calculus. It's a course I hope to take in College along with GR and SR.