GYAN about WHAT – WHY – HOW ? Archive

INFRARED COMMUNICATION

Have you ever wondered how your TV remote works? How is that you are able to switch channels being seated at a place? It is always so fascinating to learn about the devices you use in daily life, isn’t it? The link between the TV and the remote is the infrared rays. If there is any obstacle in the path of this IR rays, the instrument does not function.           How is Infrared used in communication? Infrared (IR) communication allows devices to communicate with each other in a short-range. Infrared or IR as the name goes

10 common fallacies & misconceptions about biology!!

Human have blue coloured blood in veins      In reality, there is no blue human blood. The misconception is that the oxygenated blood is red and the deoxygenated blood is blue in colour. And thus veins carry blue blood. But the fact is that the veins carrying deoxygenated blood appears blue from the skin surface. Light from outside illuminates veins to appear light through the layers of skin. It is not the colour of blood which is blue. The fact is oxygenated blood is dark red in colour and the deoxygenated appears a little lighter red than the oxygenated blood.

ELECTRO MAGNETIC INDUCTION

What is EMI? EMI is a phenomenon in which an electric current or electromotive force is induced in the coil due to a magnetic field produced in the coil. Michael Faraday is the scientist behind the invention of electromagnetic induction. Though Faraday was first to publish this but it was discovered autonomously by Joseph Henry. This electromagnetic induction is dependent on Faradays Laws of a magnetic field. Faraday first proved this electromagnetic theory by winding copper wires to both ends of the iron rod. He explained this theory using a concept of lines of force. What is Faradays experiment? Faraday

BLUETOOTH TECHNOLOGY

Bluetooth is one of the wireless technologies for the sharing of data over short distances. This short link service using radiowaves was initiated by Nils Rydbeck CTO at Ericson mobile in Lund. In 1998 the Bluetooth technology was adapted and it kept on evolving to date.  Bluetooth is managed by Bluetooth Special Interest Group (SIG). The data transmission was done using the radio waves of ISM band 2.4 to 2.485GHz.   Even before we get to know how Bluetooth functions let’s see its timeline of evolution from the time of its invention to date. 1998: The research was completed and

Layer of Earth ASTHENOSPHERE !!

ASTHENOSPHERE The asthenosphere is one of the layers of earth lying below the lithosphere, approximately 80 to 200km beneath the earth’s surface and is a part of the upper mantle. It is made up of a layer of solid rocks. It has so much of pressure and heat that these solid rocks just flow down like liquids. These asthenosphere rocks are less dense than the lithosphere. This factor accounts for the movement of tectonic plates in the lithosphere to move on the earth’s surface. The temperature defines the thickness of the asthenosphere layer. As the temperature increases, the pressure exerted

What is STEM education? How is STEM important for your children’s overall development?

There has been a surge in STEM based workshops for children in the age group of 4 – 14 years, since the past few years. A lot of interest and curiosity has also been generated by these new age STEM workshops, giving rise to questions, such as “Will it be too much for children to handle?”, “Will the children be able to comprehend?”, “What is the need for STEM education in school, when children would learn about it in college?”, “How is STEM education employed?”, “Why is STEM education needed for children?”, “Which is the ideal age to enroll children?”,

Why do we have different blood types?

As a kid when I felt down, my mother used to say “Cheer up kid, after all, you are a B +ve. And I used to think that all the positive people in the world had B+ve blood group and all the pessimists had B –ve. I stuck on to that idea for quite a while before realizing how silly it was. Later in my science classes, I learned the types of the proteins and sugars, inherited from our parents, which determine our blood group. These sugars found (or expressed) on the surface of red blood cells define blood types

Does Jupiter protect Earth?

Jupiter is the biggest planet in the solar system and because of that its gravitational pull is also very high. Because of its high gravitational force, Jupiter has done many favors to our planet. It helps to keep asteroids away from bombarding to Earth, and protects our planet. One French scientist called Pierre-Simon Laplace found that a comet which was heading towards earth’s surface got into Jupiter’s gravitational field and got expelled from earth’s direction. Like this Jupiter act as a protector of our planet and our lives. Jupiter is the fifth planet, if we consider the distance from Sun.

Why do the rainbow colors appear in that order?

Sunlight is consisting of multiple wavelengths of light. It includes wavelengths of light which is not visible to us, such as infrared and ultraviolet light, as well as the visible spectrum. Reflection, refraction and dispersion of sunlight inside water droplets in the atmosphere, causes the formation of rainbow which appears as a spectrum of light in the sky. Rainbow appears as a circular arc with various colors and it always seen in the section of sky which is directly opposite the sun. A rainbow is not a physical object and it cannot be approached. It does not exist at one

Do You Know what it feels like to be a Test-Tube Baby?

In the case of normal pregnancy, a sperm cell from male fertilizes an egg cell from a woman. The fertilized egg then gets attached to the wall of the uterus and starts to develop into a baby. But in some cases sperm cells fail to fertilize the egg and the embryo will not be formed and pregnancy will not be happening. In such situations people make use of Assisted Reproductive Technology (ART) to help women become pregnant. In vitro fertilization (IVF) is one of the common ART methods. In the IVF procedure, egg cell is fertilized outside the body and