Radioactivity Quotes

[Concerning] phosphorescent bodies, and in particular to uranium salts whose phosphorescence has a very brief duration. With the double sulfate of uranium and potassium ... I was able to perform the following experiment: One wraps a Lumière photographic plate with a bromide emulsion in two sheets of very thick black paper, such that the plate does not become clouded upon being exposed to the sun for a day. One places on the sheet of paper, on the outside, a slab of the phosphorescent substance, and one exposes the whole to the sun for several hours. When one then develops the photographic plate, one recognizes that the silhouette of the phosphorescent substance appears in black on the negative. If one places between the phosphorescent substance and the paper a piece of money or a metal screen pierced with a cut-out design, one sees the image of these objects appear on the negative. One can repeat the same experiments placing a thin pane of glass between the phosphorescent substance and the paper, which excludes the possibility of chemical action due to vapors which might emanate from the substance when heated by the sun's rays. One must conclude from these experiments that the phosphorescent substance in question emits rays which pass through the opaque paper and reduces silver

Henri Becquerel

The USA government states that the New Mexico Trinity nuclear bomb site is still highly radioactive and 'harmless'. It is interesting to note in the era of Electromagnetic Hypersensitivity (EHS) that it is USA government policy that radio frequency (RF) and electricity are also 'harmless'.

For ten years after the atomic bomb was dropped there was so little public discussion of the bomb or of radioactivity that even the Chugoku Shinbun, the major newspaper of the city where the atomic bomb was dropped, did not have the movable type for 'atomic bomb' or 'radioactivity'. The silence continued so long because the U.S. Army Surgeons Investigation Team in the fall of 1945 had issued a mistaken statement: all people expected to die from the radiation effects of the atomic bomb had by then already died; accordingly, no further cases of physiological effects due to residual radiation would be acknowledged.

As chemists, we must rename [our] scheme and insert the symbols Ba, La, Ce in place of Ra, Ac, Th. As nuclear chemists closely associated with physics, we cannot yet convince ourselves to make this leap, which contradicts all previous experience in nuclear physics.

Otto Hahn