SRC Blog

 Black Hole and its Latest Discovery   By – Monodivya Dewan   For many years the term black hole has fascinated millions, so without any further due let us dig into this topic.  The term black hole is of a very recent origin. It was coined in 1967 by an American astronomer John Wheeler as a graphic description of an idea that goes back at least two hundred years, to the time where the wave particle duality of quantum mechanics was bought into the lime light.  • If the light is made up of wave it was not clear how it would respond to gravity  • If the light is composed of particle, gravity might have an important effect.  On this assumption, John Michell, a Cambridge don, pointed out that a star that was sufficiently massive and compact would have such a strong gravitational field that light could not escape. Michell suggested that there might be a large number of stars like this. Although we would not be able to see them. Such objects are what we ...

  SPECIAL THEORY OF RELATIVITY      TWINKLE GURUNG (PHYSICS DEPARTMENT) In physics ,the special theory of relativity ,is a scientific theory regarding the relationship between space and time. In Albert Einstein’s original treatment ,the theory is based on two postulates: 1.The laws of physics are invariant in all inertial frames of reference . 2.The speed of light in vacuum is the same for all observers , regardless of the motion of the light source or observer. Special relativity was originally proposed by Albert Einstein on 26 September 1905. The incompatibility of Newtonian mechanics with Maxwells’s equations of electromagnetism and experimentally the Michelson-Morley null result demonstrated that the historically hypothesized luminiferous aether did not exist.This led to Einsteins’s development of special relativity ,which corrects mechanics to handle situations involving all motions and especially those at a speed close to that of light (known as re...

खगोल जीव विज्ञान १०१ : छोटो प्रस्तुति अन्मोल सुब्ब ( भौतिकी विभाग  ) द्वारा  जबदेखि प्रारम्भिक मानिसहरु रातको आकाश र ताराहरु लाई आगोको गोलो को रूप मा देखे, मानवता ले सोध्नु भएको छ कि उनीहरु एक्लै छन् कि छैनन्? प्राचीन ग्रीकहरु हाम्रो ग्रह भन्दा बाहिर जीवन मा विश्वास गरे तर उनीहरु लाई आफ्नो विश्वास साबित गर्न को लागी उन्नत प्रविधि थियेनन । २० औं शताब्दीको उत्तरार्धमा, एक मंगल ग्रह उल्कापिण्डमा जीवाणुको जीवनको सम्भावित अवशेष र अन्य ताराहरु को परिक्रमा गर्ने पहिलो ग्रहहरु को खोजले पृथ्वी भन्दा पर जीवन को अस्तित्व को प्रश्न लाई वैज्ञानिक को अग्रणी मा ल्यायो। २१ औं शताब्दीमा खगोल जीव विज्ञान नामक नयाँ क्षेत्र विज्ञानमा जन्मिएको थियो। खगोल जीवविज्ञान के हो? खगोल जीव विज्ञान ब्रह्माण्डमा जीवनको उत्पत्ति, विकास, वितरण र भविष्यको अध्ययन हो। यो क्षेत्र मा तल दिइएको शामिल छ: १. हाम्रो सौर्यमण्डलमा बस्न योग्य वातावरण र हाम्रो सौर्यमण्डल बाहिर बस्न योग्य ग्रहहरुको खोज, २. पृथ्वी मा जीवन को उत्पत्ति र प्रारम्भिक विकास मा अनुसन्धान, 3. पूर्व जीवन रसायन शास्...

by Esha Chettri (Physics Dept.) THE MILKY WAY GALAXY   The Milky Way Galaxy is a large spiral system consisting of several hundred billion of stars including our Sun and the Earth. Earth is located about halfway between the center of the Milky Way and its outer edge. It’s estimated visible diameter is 100,000-200, 000 light-years. It is called a spiral galaxy because if we could view it from the top or bottom, it would look like a spinning pinwheel. Galileo was the first to see the Milky Way Galaxy in 1610.  Milky Way Galaxy  The milky Way gets its name from a Greek myth about the Goddess Hera who sprayed milk across the sky. If you are someone fond of stargazing like I am, you could see about 6000 stars belonging to the milky way from Earth without a telescope. If you think of the entire Milky way Galaxy as a giant pizza then all the stars you can see from the Earth fall within about one pepperoni on that pizza. artistic picture of milky way galaxy misconceptions a...

  A cosmic Rose - by Anmol Subba (Physics Dept) In celebration of the twenty-first anniversary of the Hubble Space Telescope's deployment in April 2011, astronomers at the Space Telescope Science Institute pointed Hubble's eye to an especially photogenic group of interacting galaxies called Arp 273. The larger of the spiral galaxies, known as UGC 1810, has a disk that is tidally distorted into a rose-like shape by the gravitational tidal pull of the companion galaxy below it, known as UGC 1813. A swath of blue jewels across the top is the combined light from clusters of intensely bright and hot young blue stars. These massive stars glow fiercely in ultraviolet light. The smaller, nearly edge-on companion shows distinct signs of intense star formation at its nucleus, perhaps triggered by the encounter with the companion galaxy. A series of uncommon spiral patterns in the large galaxy is a tell-tale sign of interaction. The large, outer arm appears partially as a ring, a featur...

  Forest Fires : Cost of Climate Change By – Sai Prasanna Thapa (Chemistry Dept) According to Wikipedia, climate change includes both global warming driven by human-induced emissions of greenhouse gases and the resulting large-scale shifts in weather patterns. Caused by natural and human reasons, climate change is a crucial trial marked by life-threatening losses involving humans and landscapes. Rise in sea level and temperature, extended drought periods, abnormal variation in precipitation events, shrunken glaciers etc. are few notable effects of climate change. picture courtesy wikipedia  Climate change is a significant component that elevates the risk of fire in forests. The drying of the organic matter in the forests is augmented by climate change and has increased the number of forest fires between the years 1984 and 2020. Researches confirm that due to an increase in the temperature-creating dry and warm conditions in the Earth-prolongs the life of a wildfire. The U.S....

Riemann Hypothesis and its connection to Prime Numbers. by Ankit Subba (Mathematics Department) Primes are of the utmost importance to number theorists  because they are the building blocks of whole numbers , and important to the world because their odd mathematical properties make them perfect for many uses such as cryptography. One key puzzle facing number theorists is the distribution of primes: There is no known way, other than brute-force computation, to predict exactly where the nth prime number will be or what the distance between two consecutive large primes will be . Considered by many to be the most important unsolved problem in mathematics, the Riemann hypothesis makes precise predictions about the distribution of prime numbers. As the name suggests, it is for now only a conjecture. If proved by you, it would immediately solve many other open problems in number theory, refine our understanding of the behavior of prime numbers and earn you a million dollars as it is mille...