Back to Top. 1  These are the waves which are having the lowest frequency in the electromagnetic spectrum. They are given out by transmitter. 2  They are formed as a result of thunder, lightning etc. 3  They are used in communication mostly.  They are of four types of radio waves 1  namely: Long wave.  Medium 1  wave. Ultra high frequency  (UHF)
What is the role of arsenic in the mining industry . Arsenic is a naturally occurring element commonly found as an impurity in metal ores, and is produced commercially for use in pesticides, wood preservatives, and , Get Price arsenic - definition of arsenic by Medical dictionary
How could the mining industry prevents arsenic pollution? We know that Arsenic is released into the environment naturally through the weathering and erosion of sulphide minerals. . These sulphide minerals can form soils with very high concentrations of arsenic, and can dissolve in water. An estimated 25% of arsenic emissions into the atmosphere come from natural sources, mostly volcanoes. The majority of the arsenic released ends up in the soil and the ocean.