Using water as the detection medium is a way to provide a very large target mass at reasonable cost-all the world's largest neutrino detectors are water Cherenkov experiments. Neutrinos are very weakly interacting, so in order to acquire a good neutrino data sample, you need both an intense neutrino source, to maximise the number of neutrinos, and a very large detector, to maximise the number of chances for each neutrino to interact Support for refugee students and scholars.Conferences, events, visitor accommodation and weddings.Worldwide Universities Network at Sheffield.Research centres, institutes and networks.Coronavirus: our research and innovation. Take a ten question quiz about this page. Particle accelerators can accelerate electrons and protons to nearly the speed of light. Many aspects of the theory of relativity have been confirmed by experiments run with particle accelerators.When you sit on a red-hot cinder a second seems like an hour. Albert Einstein once said, "When you are courting a nice girl an hour seems like a second.Scientists think that the universe is expanding and that parts of it are moving away from us at faster than the speed of light.Theoretically, if you could travel faster than the speed of light, time would go in reverse.Interesting Facts about the Theory of Relativity This is not science fiction, but real stuff! However, scientists have been able to run experiments with very accurate clocks to prove the theory true. As big as the Earth is, it hardly bends light at all.Ī lot of the theory of relativity seems like science fiction, especially concepts like time dilation. However, it takes a huge amount of gravity to bend light significantly. The Sun actually bends light enough that we can see stars that are barely behind the Sun. This is very small difference, however, nothing you would ever notice.Īnother concept from general relativity is that rays of light will bend in a gravitational field. You will actually age slower at the beach than at the mountains. This means that time will pass faster on top of a mountain than at the beach. In Einstein's theory of general relativity he proposes that time will run more slowly the stronger the gravity. You would only be a few years older, but everyone on Earth would be much older. In fact, more than sixty years would have passed on Earth. However, the clock on Earth was moving much faster. On that space flight you flew around outer space at near the speed of light for around three years according to your clock. Time dilation says that time will pass slower for someone traveling near the speed of light relative to someone standing still.Īs an example of time dilation, let's imagine you left on a space flight today. One of the most interesting results of the theory of relativity is time dilation. Light can not only travel fast, but it can travel great distances too. Some stars and galaxies are so far away that the light we are seeing left the stars billions of years ago. That is five trillion, nine hundred billion miles. A light year is the distance that light travels in one year. Einstein's theory of relativity helped to explain why this happened.Īstronomers use the speed of light to measure how far away stars and other galaxies are from Earth. Einstein found that when objects started to approach the speed of light, then the laws of physics that Isaac Newton came up with started to break down. It was this constant speed of light that inspired Albert Einstein to come up with the theory of relativity. It turns out that there is nothing faster than light. In physics, it is a constant and is usually represented by the letter "c" in formulas. To put it another way, light travels 186,000 miles in a second. However, it just seems that way, light actually travels at a given speed. You may think that light is instantaneous, that when you turn on the light in your room, the light instantly illuminates your entire room. One of the important concepts of the theory of relativity is the speed of light. This page is a continuation of the Theory of Relativity page.
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