The Effect of Pressure upon Arc SpectraNo5Nickel, $\lambda $ 3450 to $\lambda $ 5500, Including an Account of the Rate of Displacement with Wave-Length, of the Relation between the Pressure and the Displacement, of the Influence of the Density of Material and of the Intensity of the Spectrum Lines upon the Displacement, and of the Resolution of the Nickel Spectrum into Groups of Lines . k or—5 ? a = slightly broadened. b = greater broadening (includes moderate, considerable, great, &c). s = sharp at atmospheric = nebulous at atmospheric pressure or under high = broadenin
The Effect of Pressure upon Arc SpectraNo5Nickel, $\lambda $ 3450 to $\lambda $ 5500, Including an Account of the Rate of Displacement with Wave-Length, of the Relation between the Pressure and the Displacement, of the Influence of the Density of Material and of the Intensity of the Spectrum Lines upon the Displacement, and of the Resolution of the Nickel Spectrum into Groups of Lines . k or—5 ? a = slightly broadened. b = greater broadening (includes moderate, considerable, great, &c). s = sharp at atmospheric = nebulous at atmospheric pressure or under high = broadening or reversal is unsymmetrical. Lines 8 and 31 not included in this diagram (cf. Diagram 6, fig, 4). The characteristics of lines falling into the second part of Group I. (Group Ib.) are :— 1. Greater broadening. [Many are described as moderately broadened, some as greatly broadened, though several are described as slightly broadened.] 2. Nebulous at one atmosphere or nebulous at 10 atmospheres. 3. The reversed lines are less symmetrical. 4. Tendency to weaken under pressure. The characteristics of the lines falling into Group II. are :—• 1. Great broadening. 2. Their unsymmetrical appearance under pressure. They are all broadened greatly to the red side. 3. None are reversed under pressure. -14 * -14 242 DR. W. GEOFFREY DUFFIELD ON THE If we include in our survey th
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectproceed, bookyear1915
