Introduction

Hello everybody,
A blog about general science. The science behind things happening around us. Not about fancy scientific formulas and theorems but easy to understand basics behind them.
Hope you guys will like the contents
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Halogen Lamps, How Halogen Lamps work

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Incandescent lamp is very simple in construction and principle. Electrons when flow through a resistance generates heat. More the resistance more the heat. In this lamp a high resistance tungsten filament is used. When a voltage is applied the tungsten filament gets red hot and glows. The problem is when it glows it causes a slow evaporation of the tungsten filament. The evaporated tungsten deposits on the inner side of the glass bulb and blackens the bulb. This dims the glow of the bulb, and also there is a loss of material from the filament. Eventually the filament weakens and breaks. To solve this problem this bulb is modified a little bit. Halogen materials are chemicals elements that are very active to react with metal and form salt. Iodine and Bromine are halogen. In a halogen lamp a little bit of Bromine or Iodine is introduced inside the bulb. When the tungsten evaporates it reacts with the Bromine/Iodine and form salt. And at higher temperature the sal...
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Why do we gulp when drinking, and don't sip

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How we quench thirst We feel thirsty we drink water that's simple. But what happens in the biology of our body? Let's have a look Why we feel thirsty? There have receptors in our blood vessels to measure the salt content in the blood. When water level in our body gets low the salt density gets high and the receptors send signal to the brain that we need to drink water, this feeling is what we call Thirst. But interesting thing is when we are very thirsty if we sip water slowly or have a piece of watermelon ( which is 90% water ) we don't feel satisfied. The Thirst is quenched only when we gulp water, even if we consume the same amount of water if sipped. So why we gulp? According to a researchers group from California Institute of Technology, this works in a cycle called Thirst Circuit. There is a part in brain MnPO (Median preoptic nucleus) which, with the help of other parts of the Brain named SFO & OVLT does the work. It takes...
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Reflection of Light

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Reflection of light is a phenomenon of bouncing back of light after hitting a surface. When a ray of light falls on a surface some of the light reflects, some passes through the surface (refract) and some gets absorbed by the surface. As of now we are talking about reflection only. When the surface is smooth like mirror or polished metal surface the kind of reflection takes place is called Specular Reflection. 2 things are to be noted here The incident ray, the reflected ray and the normal ( perpendicular ) to the surface lie on the same plane The angle of incidence and the angle of reflection are always equal They are called laws of reflection of light. But if the surface is not smooth like, wall or paper or screen the incident rays reflect in different directions and the light diffuse in the surrounding. This type of reflection is called Diffuse Reflection. Mirror Vs Screen In Mirror Specular Reflection takes place and the reflected ray of ligh...
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