T.E.M.S Journal [Technology Engineering Maths Science]

Low speed wind tunnel design configuration without formula

2020-09-10T17:57:29+00:00

Subsonic wind tunnel is a type of wind tunnel where speed (inside test section) range less than 0.3 Mach. The wind tunnel we have is a very low speed, open circuit, suction type with square cross-section. Its flow velocity is about 0.03 Mach (i.e. about 10m/s) and this is because of fan limit (we have used 9 inch, 2-blade type propeller with a Brushless DC motor). It is entirely made from stainless steel sheet (1/2mm thick). Sections are joined through rivet joints. Theoretically, our critical laminar flow speed is approximately 0.12m/s. Its total length is 1.9m.

Davisson-Germer Experiment

2021-06-23T09:37:29+00:00

This article is about the experiment which provided the first evidence of matter waves. In 1927 Davidson and Germer provided the first experimental evidence of matter waves through diffraction of slow electrons, the associated de Broglie wavelength of which is of the order of atomic spacings of most of the crystalline solids. Thus the atoms of a crystal can serve as a three dimensional array of diffracting centers for the de Broglie matter waves.

Lorentz transformation

2021-06-07T06:41:27+00:00

Einstein in 1905, after a thorough analysis of facts and after the failure of aether theory, proposed the special theory of relativity. It has two postulates.

Hawkin's Radiation

2021-06-22T06:12:12+00:00

This article is about Hawkins radiation, originally predicted by Stephen hawking in 1974.

Entropy: The thermodynamical arrow of time

2021-06-04T12:29:19+00:00

This article is about how the concept of entropy and thermodynamical arrow of time comes from 2nd law of thermodynamics.

Planck's Length

2021-06-19T07:23:02+00:00

This article is about Planck's length, proposed by Max Planck as a unit of length along with other Planck unit. In 1899, Max Planck proposed that there should be some fundamental units of length, time, mass and energy. Turns out, that this Planck's unit can be found from different combinations of speed of light, Gravitational constant and Planck's constant. Planck derived them using dimensional analysis. Planck's length is given by,

Michelson – Morley experiment and Aether theory

2021-06-04T11:43:46+00:00

This article is about the famous experiment which disproved the existence of aether.

White dwarfs and the Mass-Radius Relationship Observation

2021-06-17T08:59:27+00:00

This article is about White dwarfs, their mass and radiation relation and the recent methods developed to observe those phase of the white dwarfs by scientists of Johns Hopkins university.

Review of Defence LTE Solutions

2021-03-20T11:47:51+00:00

This article is about Defence LTE Solutions. It is developed by Thales.

STERN-GERLACH EXPERIMENT

2021-06-16T08:29:55+00:00

Stern-Gerlach experiment is a clear demonstration of space quantization of angular momentum of the electron and the electrons spin. The aim of this experiment was true Prove the Bohr-Sommer field theory, that the direction of angular momentum of a silver atom is quantised, but experiment give some unpredicted result which was in agreement with the hypothesis of spin that was given later. It is a very celebrated experiment conducted by the German scientists in 1922.

Review of Global 6500 Business Jet

2021-03-19T12:00:04+00:00

This article is about Global 6500 Business Jet. It is manufactured by Bombardier.

Interpretation of Quantum Theories

2021-06-14T06:56:24+00:00

This article is about the different interpretations
of the quantum theory in details namely
Copenhagen interpretation, hidden variable theory,
many world interpretation, Spontaneous collapse.

Review of McX

2021-03-11T11:19:25+00:00

This article is about McX. It is developed by Crane Aerospace and Electronics.

Co-existence of Superconductivity and Ferro-Magnetism

2021-06-11T05:48:17+00:00

This article is about coexistence of superconductivity and ferro-magnetism. Theoretically it was believed that coexistence of superconductivity and ferro-magnetism is not possible due to Meissner effect, but recently many compounds are found where superconductivity and ferro-magnetism co exists.

Review of Avangard

2021-03-02T11:23:01+00:00

This article is about Avangard. It is developed by Russia.

Double slit Experiment with Electrons

2021-06-09T10:04:39+00:00

This article is about the famous double silt experiment on electrons which sparked up many among the prominent scientists about the interpretation of the result of the interpretation.

Manometer and its amplification techniques

2020-09-10T18:56:11+00:00

Manometer is one of the most important instrument to measure pressure or pressure difference. This pressure difference is than calibrated to give various other quantity including velocity. If we look at the physics of a simple manometer than its fundamental principle is the hydrostatic law which relates the pressure at a given point with the difference in level of the fluid. If density and gravity are assumed to be constant than there is no way we can magnify the vertical level of fluid for a given pressure as per hydrostatic law (Δp=ρgΔh). Hence we search for other indirect method to magnify the readings to increase the sensitivity of the instruments. Here I present four different ways we can apply to amplify the reading to increase its sensitivity.

Breakthrough in Structural Mystery of Glass

2021-06-24T06:41:27+00:00

This article is about the structural mystery of glass and other amorphous solids in general which is solved by the team of physlead by prof. Wang of city university of Hong Kong.

Andrews' Experiment and Real Gas

2021-06-08T04:40:30+00:00

This article is about Andrews's enhaustiveexperiment on the isotherm of carbon dioxide gasand formed the experimental base of real gas.

Gluons and Gluons Exchange Models

2021-06-23T09:34:10+00:00

This article is about quarks and gluons and a quick look into gluon exchange model by the scientists from institute of nuclear physics of Polish Academy in Cracow

Compton Effect

2021-06-07T06:11:46+00:00

This article is about the mechanisms of Compton scattering.

Quantum Gravity

2021-06-22T06:06:52+00:00

This article is about quantum gravity and briefly explanation of the two important and contracting theories of quantum gravity that is M- theory and loop quantum gravity

Photo-Electric Effect

2021-06-04T12:14:13+00:00

This article describes the mechanisms of photoelectric effect.

Bohr's Model of Hydrogen Atom

2021-06-18T11:31:31+00:00

This article is about the atomic model put forward by Bohr which retains the essential features of Rutherford while using the quantum ideas of Planck and Einstein.

Review of Mission System for Air Launched Effects

2021-03-20T11:47:50+00:00

This article is about Mission System for Air Launched Effects. It is developed by Collins Aerospace.

Blackbody Radiation

2021-06-16T08:35:38+00:00

This article is about the spectral distribution of blackbody radiation.

Review of Ground Fire Radar

2021-03-20T11:36:32+00:00

This article is about Ground Fire Radar. It is developed by Thales.

TIME DILATION

2021-06-14T07:03:13+00:00

This article is about relativistic time dilation as proposed by Albert Einstein in his special theory of relativity.

Review of SPECTRO XR

2021-03-19T11:49:03+00:00

This article is about SPECTRO^TM XR. It is developed by Elbit Systems.

Polarisation of light

2021-06-12T07:01:01+00:00

This article is about polarisation. It was first observed by Erasmus Bartholinus in 1669.

Review of Integrated Digital Vision System

2021-03-10T11:38:30+00:00

This article is about Integrated Digital Vision System. It is developed by Collins Aerospace.

Physics of Auroral Emissions

2021-06-10T11:21:19+00:00

This article is about formation of aurora after electrons gets accelerated in the last part of their journey by alfvèn waves. The recently done experiment shows that there is a clear casual relationship between alfvèn waves and acceleration between Alfvèn waves and accelerated waves that directly effect auroral emissions.

Review of Hypersonic Technology Demonstrator Vehicle

2021-03-02T11:09:18+00:00

This article is about Hypersonic Technology Demonstrator Vehicle. It is developed by DRDO.

Phase and Group Velocity of Matter Waves

2021-06-09T09:38:53+00:00

This article is about the phase velocity andgroup velocity of a matter wave and why particlewas started to getting associated with wave packet.