Hello, Science enthusiasts, We are observing the lightings used for our daily use. We see these mostly in the houses, industries, offices etc.., Some of them are LED, CFL and Incandescent lamps. The incandescent lamps are a very old model. These incandescent lamps have a filament. Nowadays we are using LED bulbs.
These incandescent bulbs will emit heat energy proportional to the light energy. In the usage of this incandescent lamps, there’s a huge loss. For example, some small flies are exhausted by using this type of lamps. We face lots of disadvantages in the usage of the incandescent lamps.
These lamps consume more energy and give less lux. Due to these usages, we wasted the lots of energy. To overcome such many problems, many scientists think to develop the new technology to decrease the power consumption and increase the luminous intensity emitted by the bulb.
The construction of this incandescent lamp consists of a conical flask inverted shape and there were the two electrodes consists of a high resistive material to close the circuit. These are fixed to the below holder. The inside of this lamp has a gas like argon.
Which is an electrical insulator? Do you observe that even the huge amount of heat released by the bulb, the filament in the bulb will not melt? Now, let’s learn that “what is happening in the bulb, why the filament is not melting”.
Here’s the reason why the filament in the lamp will not melt:
For burning of any material, we must need the air. Oxygen in the air is one of the main sources in the burning of any material. But here in the electric bulb, there will be no oxygen presence. In inside the bulb, argon gas will present between filament and bulb glass.
So, how much the temperature would be in the bulb, if there is no oxygen then no burning will take place. When we place the glowing candle in the area where the oxygen is not present then it will stop burning.This experiment is done by many of members, why others we also know that it will shut off because of no oxygen presence. Similarly, in the electric bulb only because the presence of the argon gas in it when the filament is glowing even in high temperature the filament will not melt. The manufacturing company chooses the filament type which should have the highest melting point.
The material we use for the filament in the bulb is tungsten. This is a type of high resistive material. When the supply passes through this high resistive material then it develops heat. Due to this, we experience some light emitted. The temperature inside the bulb is very high when compared to the temperature outside of the bulb.
This filament is of small diameter and formed as the spring. This spring is mounted at the both electrodes. If these connections are broken then the bulb is of no use. We should dispose of that bulb.
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