By James Barry
The function of this monograph is to study the recognized actual facets of 2 strange sorts of atmospheric luminous phenomena, to infer their features and houses, and to advertise efforts to enhance their knowing. those kinds, known as ball lightning and bead lightning, have visible photos that fluctuate from the linear photo linked to normallightning. The phrases "balliightning" and "bead lightning" are used to indicate atmospheric luminous types that are sometimes saw and feature the geometrie form steered through their identify. Vet, it's attainable that neither phenomenon may well in truth be a kind of lightning within the experience of a continual electric discharge. Bead lightning has been defined because the residue of a cloud-to cloud or cloud-to-ground lightning stroke and has the looks of aseries of luminous balls separated via darkish areas, therefore comparable to astring of pearls, and continues to be seen for approximately one moment. Ball lightning has been defined as a unmarried luminous globe showing ne ar the floor after a lightning stroke and likewise ultimate obvious for approximately one moment. either phenomena stay seen a ways longer than common lightning flashes.
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Extra resources for Ball Lightning and Bead Lightning: Extreme Forms of Atmospheric Electricity
2 m) deep. In contrast to these reports of serious damage, others have indicated that ball lightning does not emit heat and does not cause harm to Ball Lightning 39 objects. Margs (1956) reported that no heat was detected by a dose observer, but that the fireball damaged a roof. In contrast, Muirhead (1883) observed a ball lightning on a roof which caused no damage. Browne (1964), analyzing a balliightning event in 1665, indicated that no heat was feit and no damage found after the object struck a house.
Luminous phenomena as weil as balilightning reports have been übserved during earthquakes and snow storms as weil. The appearance of a balilightning during a snow storm was reported, for example, by Zalesskii (1958). A 4-cm-diameter red-colored sphere was observed to form about 4 m above the ground. Electrical activity was apparent as small-scale discharge crackling between the electrified snow flakes was audible. Electrical activity in falling snow has been previously studied. Herman (1964), for example, found that the space charge in blowing snow could be 5 x 10- 10 C m - 3 or a charge per snow particle of order 1 x 10- 15 C.
F. , Refugio, Texas, Oct. 1977. aperture was open for 25 msec, dosed for 38 msec, and required 6 msec to open or dose. A moving luminous event wh ich would occur within the 25 msec period would be fuHy recorded on the film. A typical lightning step leader from doud to ground would occur in about 20 msec, as measured by Krider, Weidman, and Noggle (1977). The return stroke would take less than a millisecond. A dart leader requires only a few milliseconds to go from doud to ground. The only lightning stroke that occurs slowly compared to the shutter period would be the step leader.