radioactive source is one man made source of background radiation.
radioactive source is one man made source of background radiation.
name one man made source of background radiation?
radioactive source
background radiation









































background radiation is a measure of the level of ionizing radiation present in the environment at a particular location which is not due to deliberate introduction of radiation sources.









































background radiation originates from a variety of sources, both natural and artificial. these include both cosmic radiation and environmental radioactivity from naturally occurring radioactive materials (such as radon and radium), as well as man-made medical x-rays, fallout from nuclear weapons testing and nuclear accidents.









































section::::definition.
background radiation
the background rate for natural radiation varies considerably with location, being as low as 1.5 msv/a (1.5 msv per year) in some areas and over 100 msv/a in others. the highest level of purely natural radiation recorded on the earth's surface is 90 µgy/h (0.8 gy/a) on a brazilian black beach composed of monazite. the highest background radiation in an inhabited area is found in ramsar, primarily due to naturally radioactive limestone used as a building material. some 2000 of the most exposed residents receive an average radiation dose of 10 mgy per year, (1 rad/yr) ten times more than the icrp recommended limit for exposure to the public from artificial sources. record levels were found in a house where the effective radiation dose due to external radiation was 135 msv/a, (13.5 rem/yr) and the committed dose from radon was 640 msv/a (64.0 rem/yr). this unique case is over 200 times higher than the world average background radiation. despite the high levels of background radiation that the residents of ramsar receive there is no compelling evidence that they experience a greater health risks. the icrp recommendations are conservative limits and may represent an over representation of the actual health risk. generally radiation safety organization recommend the most conservative limits assuming it is best to err on the side of caution. this level of caution is appropriate but should not be used to create fear about background radiation danger. radiation danger from background radiation may be a serious threat but is more likely a small overall risk compared to all other factors in the environment.
ionizing radiation