Pretid oe eee . ‘ 7 eee MESees: e . oPt . \ TRL AST COED eT ‘ SENTGO DaSETS oh wee ae AN a. See es _* « wor, , peewee wy a4 T iia *WATER BAND. AROUND 57004 vi Fig. 4.5-—— Agreement of Mike and King (total) spectra with sky spectrum in 5925 A region. 4.4. 2 Mike and King _- Above about 5200 A, the observed absorption spectra of bombs can be accounted for almost entirely by the absorption of the normal atmosphere between the explosion and the point of ob- ' “vation. The absorption structure is mainly due to water vapor and oxygen molecules. This Pome ta fastly seen by examining the plates with an eyepiece; but to make the comparison more Wantitative, microphotometer traces of the long-wavelength region (up to about 6500 A) of a S€Y spectrum taken during the Ivy tests have been compared with traces of Mike (total) and _ “ing (total and first maximum). Figure 4.5 shows how these traces agree in the region of be - 9085 A. Except for some oxygen I linesat 5328, 6156, 6188, and 6158,.7771, 7774, and.7775 A -.~ and very probably nitrogen I lines at 5357, 5281, and 5369 A on the Ivy plates, a comparison of | the Ivy and sicy plates shows them ail to be the samein.this region.:At about 5450 A; Mikeap- Peara to have an open structure band not found ia the skyor King, ee There is a group of absorption lines in the neighborhood of 5040 A which appearstuMike. ~. and King but does not appear exactly the same in the spectrum of the aky. it cannot beAdenti-" . wo: . ~ . vat - . ett Te ar , OR re -_~ . on): : wR $ ag? ON ere age ea Mee see 2 ea MoT ete SS we ee