Yilmaz (2006) obtained Kaluza-Klien cosmological solutions for quark matter coupled to the string cloud and domain wall in the context of general relativity by using anisotropy feature of the universe. Rao and Neelima (2014) studied the anisotropic Bianchi type-VI space- time with strange quark matter attached to string cloud in Barber’s second self-creation theory and general relativity and noticed that the presence of scalar field does not affect the geometry of the space- time but changes the matter distribution. G. P. Singh and T. Singh (1999) presented a new class of string cosmological models with and without magnetic field in the context of a space-time with G3 symmetry. For this purpose the standard energy-momentum tensor for cosmic strings is modified by including an additional term for magnetic
In string theory, as in guitar playing, the string must be stretched under tension in order to become excited. However, the strings in string theory are floating in spacetime, they aren't tied down to a guitar. Nonetheless, they have tension. The string tension in string theory is denoted by the quantity 1/(2 p a'), where a' is pronounced "alpha prime"and is equal to the square of the string length scale. If string theory is to be a theory of quantum gravity, then the average size of a string should be somewhere near the length scale of quantum gravity, called the Planck length, which is about 10-33 centimeters, or about a millionth of a billionth of a billionth of a billionth of a centimeter.
Due to today’s advanced technology, “the most powerful modern telescopes can detect objects billions of light-years from Earth”. Therefore, it proves that the early universe had been more crowded and different from the present universe. Although this theory has such evidence behind it, one major doubt arises: in a world ruled by the second law of thermodynamics, how is it possible to generate such complexity – as the tendency of the universe is to go from order to
At the very start, the entire universe was about a size of an atom. It was termed by Georges Lemaitre as the “primordial atom”. As one of the pioneers of in the make of the big bang theory, Georges Lemaitre proposed this new theory. At that time, this theory has explained many difficulties that were met by the theories proposed previously. For example, a theory states that the universe is infinitely large with an infinitely amount of stars was met by the Olber’s paradox.
Astronomy is a natural science which is the study of celestial objects, the physics, chemistry, and evolution of such objects, and phenomena that originate outside the atmosphere of Earth, including supernovae explosions, gamma ray bursts, and cosmic microwave background radiation. cosmology, is concerned with studying the universe as a whole. Astronomy is one of the oldest sciences. The early civilizations in recorded history, such as the Babylonians, Greeks, Indians, Egyptians, Nubians, Iranians, Chinese, and Maya performed methodical observations of the night sky. However, the invention of the telescope was required before astronomy was able to develop into a modern science.
A repercussion of these endless possibilities is the Many-worlds interpretation which relies on quantum mechanics to explain how all possible alternate histories and futures may exist within different worlds (Everett 4). For each possible outcome to an action, our world splits into an exact replica of itself, a process known as decohesion (Clark 4). For instance, an objects wave function can be said to be of both particulate or of wave nature. Therefore, when a physicist measures the nature of this particle, the object can either be measured as a wave or a particle. To incorporate both of these possible outcomes, the universe splits into two.
Visible light rays and x-rays work in a similar manner, both being wavelike forms of electromagnetic energy carried by particles called photons. “The photon concept was introduced by Albert Einstein in order to explain physical phenomena that could not be understood based on the wave properties of light” (Bensaada, Ouellette, 2011, pg 32). The only difference between both is the energy levels of these photons, which is expressed as the wavelength of the rays. Visible light rays and X-Rays are produced by the movement of the electrons in the atom. Another form of more sophisticated X-rays are CT Scans, computer tomography also known as Cat Scans.
The theory of Black Holes and its process is one of the most unique studies of the universe, in that with each discovery made, we un-lock closed doors to knowledge of how the universe was made. In 1798 a French Mathematician Pierre Simon de Laplace came up with the first theory of a Black Hole. He agreed with Newton, that when enough mass is added to a star like the sun, the gravitational pull would become so great that the escape velocity would equal the speed of light. Therefore, the star would blink out and become an invisible star. More than a century later, Einstein, came up with the theory of relativity.
Nuclear fussion: Nuclear fusion is the process in which two light nuclei combine to form a heavier nucleus. The total masses of the products are less than the combined mass of the two light nuclei. The energy equivalent of the loss of mass is released. The release of energy during nuclear fusion can also be calculated from the values of the
His students, Antonio Stradivari and Giuseppe Guarneri, brought violin making to a new level with the help of a newly used science, physics, along with their artisans skills. After this, violin making expanded rapidly throughout Europe and the rest of the world, and for the last 150 years, violins made by Stradivari and Guarneri have been the preferred brand for orchestras around the globe. So what makes the violin so special and different from other instruments? Physics is a leading cause of why the violin is so different from others. There are many different physical concepts involved with a violin, including everything from its strings, to how it is played; even to the shape and the sound it emits.