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MIRROR SPACE PDF, EPUB, EBOOK Marianne De Pierres | 432 pages | 05 Nov 2009 | Little, Brown Book Group | 9781841497600 | English | London, United Kingdom FACT CHECK: How to Spot a Two-Way Mirror? Right-handed or left-handed refers to a particle's spin and direction of movement. The two male colleagues who proposed the underlying idea to Wu won the Nobel Prize for her discovery, but she was left out. Wu's experiment showed that the "C" in CPT symmetry is imperfect. And further experiments showed that some particles break both "C" and "P. At the particle level, the universe appears CPT symmetric. A feature of the universe that Boyle called its "zero particle state," the nature of space-time when emptied of particles, is uncertain. That means that at the scale of all space, CPT symmetry is violated. Add a second cone to space-time, and the zero particle state is no longer uncertain. The universe's CPT asymmetry is repaired. It seemed like the universe violated CPT symmetry, but actually we just weren't looking at the whole picture," he said. If the universe really is CPT-symmetric, if it really comprises two space-time cones rather than one, what would that mean for the rest of physics? The most practical consequence of the CPT-symmetric universe is a simple explanation for dark matter. One popular set of theories about the unseen stuff relies on the existence of some undetected, fourth type of neutrino — often termed a sterile neutrino. Boyle's CPT symmetry seems to point in this direction. The three known flavors of neutrino , the electron, muon and tau neutrinos, are all left-handed. That means that they fly around without a matching right-handed partner. The Standard Model assumes that, unlike other particles, neutrinos don't have such partners. But the CPT-symmetric universe disagrees, indicating they should have those partners. Boyle and his colleagues found that their cosmology implies the existence of a right-handed partner in our universe for every left-handed neutrino in the Standard Model. But, unlike left- and right-handed quarks, these left- and right-handed mirror particles wouldn't stick together. Instead, two of the right-handed partner neutrinos would have long since been lost to space-time, decaying out of our view in the very early universe. It's not clear which of the three known neutrinos it would have partnered with, Boyle said. But it would have had a particular energy signature: picoelectronvolts PeV , a measure of a particle's mass. And that PeV neutrino might account for all of that missing dark matter in the universe. The details of how the CPT-symmetric universe leads to a PeV neutrino are tricky — so tricky, Learned said, that few physicists beyond Boyle and his team understand them at all. Whether all of that complicated field theory is correct or not, I can't say. Four years ago, a particle detector hanging from a balloon over Antarctica detected something physics could not explain: Twice, as Live Science previously reported , the Antarctic Impulsive Transient Antenna ANITA instrument picked up signals of high-energy particles that seemed to shoot straight up out of the Antarctic ice. Particles like this shouldn't exist. None of the known Standard Model particles should have been able to fly all the way through the Earth and burst out the other side at such high energies, but that's what ANITA seemed to be detecting. If particles really came from space, then plunged through the Earth to produce the anomaly, they must have decayed just under the Antarctic surface, producing a shower of lighter particles that ANITA detected popping up from the ice. Learned and a team of four other researchers cooked up a scheme where this PeV dark matter neutrino might have pulled off this trick, which they wrote up in a paper titled "Upgoing ANITA events as evidence of the CPT symmetric universe" and published to the arXiv database. This is the paper The Daily Star turned into a confused headline. If the ANITA particle really did fit Boyle's scheme, that would be a strong weight on the scale in favor of the two-cone cosmos, Learned said. But it's a long shot. The most important problem they had to solve: getting the particle close enough to Antarctica. Models show that dark matter candidate particles like this PeV neutrino would fall to the center of the Earth soon after running into our planet, leaving none close enough to produce the ANITA anomaly. It was an exciting idea to play with, Learned said, but even he is not convinced by his own paper. Though Learned and his colleagues worked hard on the paper, he thinks its conclusions are surely wrong, he said. Boyle agreed. While the idea of using his team's ideas to explain ANITA was appealing, he said the numbers don't quite add up. But he's still confident the underlying idea of a CPT-symmetric universe is sound. Originally published on Live Science. View Deal. Cover the whole mirror frame using flowers and you are good to go. You can either choose a single colour to complement the colour scheme of your room or go for a mixed batch of flowers as well. Want to try some aesthetic DIY which can level up your existing decor pieces? Take a glass and use small mirror pieces to design it. You can get these tiny mirror pieces at any stationery shop. Make a design of your choice. Once done, you can use this glass as a candle holder which will look absolutely stunning once lit. You can also paint the plates using acrylic colours if you wish to. You can get circular mirror pieces from a hardware shop, which can fit in the inner circle of these plates. Use a hot glue gun to secure them in place. Do the same process with two more plates. Once done, you will have these cute little mirrors which can either be mounted on a wall or just be kept on one of the shelves as decor pieces. Give your basic mirror an earthy twist by doing this simple DIY. Just take your mirror and start sticking the jute rope along its edges using the glue gun. Make rounds and completely cover the frame. If the mirror is small in size, you can also make a loop and hang it using a jute wire to give a different look. Honeycomb mirror patterns are extremely popular on social media. You can get hexagon shaped pieces of mirrors from any hardware store and organise them on your own. Choose a wall, cupboard or wherever you want to stick them. Use a hot glue gun to secure the pieces in place and make a honeycomb pattern by using these cute little mirror pieces. Please Click Here to subscribe other newsletters that may interest you, and you'll always find stories you want to read in your inbox. Back to Top. Select a City Close. Your current city: Mumbai Mumbai search close. All Bombay Times print stories are available on. We serve personalized stories based on the selected city OK. Go to TOI. The Times of India. Stages of a relationship. Do women really like to talk after sex? Kuttu atta vs. How to take care of your skin after excessive use of mask. Should you eat a banana when suffering from diarrhea? India to roll out quick and cheap coronavirus paper test. Space sunshade - Wikipedia Because the mirror would have to have an area of , square miles — a slightly smaller area than Greenland — and launching something that big would be prohibitively expensive. Another option: billions of smaller mirrors. Roger Angel, researcher and optics expert at the University of Arizona, proposed that idea in In either case, the mirror or mirrors would orbit at Lagrange point L1, a gravitationally stable point between the Earth and the sun that's about four times the distance from the Earth to the moon. The mirrors would barely be visible from Earth and would block just 1 percent to 2 percent of the sun's light, but that would be enough, advocates of the schemes say, to cool the planet. Another option was proposed in by space consulting firm Star Technology and Research. Star's experts calculated that a network of steerable space mirrors orbiting Earth's equator, like one of the rings of Saturn, could lower the average air temperature by up to 3 degrees Celsius 5. But such an approach could generate problems. Report author and Star Technology president Jerome Pearson calculated it would take 5 million spacecraft to achieve the desired result, and even if each individual craft could last years, that means ships would have to be replaced or repaired per day. A space sunshade or sunshield is a parasol that diverts or otherwise reduces some of a star's radiation, preventing them from hitting a spacecraft or planet and thereby reducing its insolation , which results in reduced heating. Light can be diverted by different methods. First proposed in , the original space sunshade concept involves putting a large occulting disc, or technology of equivalent purpose, between the Earth and Sun. A sunshade is of particular interest as a climate engineering method for mitigating global warming through solar radiation management. Heightened interest in such projects reflects the concern that internationally negotiated reductions in carbon emissions may be insufficient to stem climate change. Proposed shade designs include a single-piece shade and a shade made by a great number of small objects.

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