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
22 Apr, 2011 uses 0. Arsenic, with the chemical symbol As and the atomic number of 33, is a chemical element that occurs in many other minerals such as sulfur and metals. It is a metalloid which usually has a metallic gray appearance. Arsenic is used in the medical treatment of cancers such as acute promyelocytic leukemia. 2  It is also used in medical solutions such as Fowlerâs solution for psoriasis. 3  Arsenic-74 an isotope is being used as a way to locate tumours within the body.