Atkinson, Philip. [from old catalog] · New York, The Century co. · leaf 272
es aresharply defined. This is due to the different angles inwhich the radiated rays impinge on the block, strikingthe lower and left edges at acute angles, and traversing THE RONTGEN X-RAYS 249 a comparatively small thickness of wood, and thus pro-ducing fringed shadows; and striking the upper… … Fig. 114. The greater thickness of air traversed by the obliquerays than by the direct rays tends to produce the sameresult; the diffusion of the rays and their absorption bythe air being directly proportional to the square of thedistance between their source and the object on which 250 ELECTEICITY…
Electricity
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