Materials used for making CDs and DVDs

                  The CD and DVDs are the best ways to store the datas in a digital format and carry them in to anywhere. There are many type of datas we can store in the CD and DVDs like Games, Songs, Photos, Films, Files and so on. Because the this memory devices gives lots of memory capacity in minimum cost. Normally the CDs gives a 700 MB of storage space also some CD manufacturer gives 800 MB of space. But the DVD’s offers lots of space then CDs that is the DVDs offers different storage spaces based on their layers. The normal DVDs offers only 4.7 GB of memory capacity. Today we are going to see what are the materials are used for making the CDs and DVDs.

  

Both the CDs and DVDs are made up with the five different types of materials to its five layers. Lets look those layers one by one,
1. The base layer made of a Polycarbonate Plastic. This base layer is used for two purposes

Materials used for making Electric Bulbs

                    In Dec. 18, 1878 the great scientist Thomas Alva Edison invented the Electric bulb. From the moment the light bulb was invented to till now people creates the different types of light with some different materials for reducing the power consumption, avoiding the global warming, produce a brighter light source and reducing the heat production. But after the light bulb was invented till now the basic principle of the light bulb not changed. There are different lights are used for different purposes, each bulbs uses some different materials. Today we are going to see that things, (i.e) What are the materials are used for making Electric Bulbs?

There are some of the materials are commonly used for making light bulbs like Tungsten, mercury, aluminum, glass