Here, let us explore various sources of light.A point to remember; Normally, there are two processes which yield light. 1. When the charges vibrate(ions, electrons) light waves[electromagnetic waves] are emitted 2. When high energy electrons return to the low energy state, the excess energy is released as light. But, in this article, we will simply say, when the atoms are agitated,.....
A small body circling around a big heavenly body is known as sattellite. Natural satellites are moons. Our earth has only one moon, where as Jupiter has 69 moons, saturn has 53, Uranus has 27 ,.... Man has made many artificial sattellites and put them into orbits. Any satellites has four main parts. 1. Solar power system 2. Control for its attitude. 3. Transmitter and Reciever 4. A payload to collect information such as camera or particle d.....
"Camera". Means a dark room. Today camera watches us everywhere. Nearly 2000 pictures are uploaded every second in face book. How the camera came into being? How people struggled to record an image? Let us flip the pages of history. Take a..
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"The humble screw thread may simply be an inclined plane wrapped around a cylinder, but without it, metaphorically and literally, the wheels would come off the modern world. Nature barely uses the concept, but for mankind it holds false teeth in place, focuses microscopes, and fastens hatches onto spacecraft. Screw threads also provide the precision movement that allows the automated manufacture of just about every piece of technology we take for granted. .....
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WHEN THE TIME STOPS? To measure time, something has to tick, for example: pendulum, quartz crystal vibrations, watch movement, atomic vibrations etc. For something to tick, energy is required. If we reduce the energy to nothing, that is if we reduce the temperature to absolute zero, we remove all the heat energy, everything will freeze and the time come to a stand still. It is said before the..
Is this slab in its original geological orientation (as when the sedimentary layers were deposited) or is it upside down? I'll answer this .....
Harry is working in a restaurant. He has to make a pot of soup every night for the next day. His problem: How long to wait for the boiling soup to cool down to room temperature? Because he has to put the soup in the fridge before closing the shop. He can speed up the cooling process by placing the closed soup pot under flowing cool tap water. He knows one fact; it takes 10 minutes to cool down to 60 degr.....
All hotels in dubai are good and have standard facilities. We are picked up from Airport by hotel van. After checking in, we were given a key-card. Even entering a elevator requires that card. At the wave of the card, the room opened. It had central airconditioning system. The temperature of the room can be controlled using a small electronic digital device embedded in the wall. The room had large french window over.....
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Today, multistorey buildings are common. To build a sky scrapper, we have to lift concrete, steel and other materials to a certain height. So, first they build a tower crane. One can see this crane near any tall building under constuction. First, let us understand the principle of this crane. Take a meter scale and hang it at the 50th cm. Take a 150 gm weight and hang it 10 cm (at 40 cm) from the centr.....
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On earth, gravity determines up and down. Gravity pulls everything down. Light objects carried up by the wind. NASA Astronauts used to have a hanging doll in their cockpit. Once they leave the earth..
In a land line, voice is converted into electrical signals by a microphone and sent through wire. The sound is reproduced by the speaker at the other end. Now we have modern technology called fiber optics. Here voice or any digital data is first converted into electrical signals and then into light signals(laser or infra red) using electronic element. It is then sent through glass fibers (strands). We k.....
Your smart phone mainly made up of pure sand-silicon. Yes, It is true. Mostly life forms are carbon based. But the electronic gadgets are silicon based (Today). Life forms are made of cells. But electronic goods are made of..
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When you are in a room,..
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