The thermosphere is the layer in the atmosphere that protects the earth as well as helps in carrying the radio signals used for communication purposes. It is the region that lies between the mesosphere (below) and the exosphere (above).
In this layer, the radio waves are used as a medium for communication. These radio waves carry the data or signals in the form of magnetic fields as well as the oscillating electric field, which are commonly considered as the electromagnetic field (EMF). These radio waves carrying information travels at a speed of light in the air, transmitting these waves in every direction.
Preventive maintenance is where measure are taken beforehand so that the chances of breakdown are minimised resulting in increased efficiency of machines. It is the maintenance that is regularly performed on any equipment to lessen the likelihood of it failing.
The tiny structures inside of cells, such as Ribosomes or chloroplasts that have specialized roles are called organelles. These structures are found in the cytoplasm of eukaryotic cells and are enclosed with a membrane. These tiny structures are not present in prokaryotes like in bacteria.
