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Ray J. m. William Ray Norwood Jr. (born January 17, 1981), [1] known professionally as Ray J, is an American R&B singer, songwriter, television personality, and actor. Born in McComb, Mississippi, and raised in Carson, California, he is the younger brother of singer and actress Brandy Norwood. [3]
In general, scientific information in Wikipedia articles should be based on published, reliable secondary sources, or on widely cited tertiary and primary sources. Sources that are robust in methodology, published in high quality venues, and authored by widely cited researchers are preferred.
Wikipedia articles should be based mainly on reliable secondary sources, i.e., a document or recording that relates to or discusses information originally presented elsewhere. Reputable tertiary sources, such as introductory-level university textbooks, almanacs, and encyclopedias, may be cited.
Radioactive source. A new sealed cesium-137 radiation source as it appears in its final state. A radioactive source is a known quantity of a radionuclide which emits ionizing radiation, typically one or more of the radiation types gamma rays, alpha particles, beta particles, and neutron radiation . Sources can be used for irradiation, where the ...
Deciding whether primary, secondary or tertiary sources are appropriate on any given occasion is a matter of good editorial judgment and common sense, not merely mindless, knee-jerk reactions to classification of a source as "primary" or "secondary".
Biomedical information must be based on reliable, third-party published secondary sources, and must accurately reflect current knowledge. This guideline supports the general sourcing policy with specific attention to what is appropriate for medical content in any Wikipedia article, including those on alternative medicine.