cover image: Proceedings of the Thirty-Sixth Indian Science Congress  Allahabad  1949  Part II  Presidential Addresses

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Proceedings of the Thirty-Sixth Indian Science Congress Allahabad 1949 Part II Presidential Addresses

1949

Thus the population becomes equivalent to a set of points W in this space and the sample becomes a subset w of W. Inferences regarding W correspond to the properties of W and the role of statistics is to infer the properties of the unknown W from a study of the known w. This is possible in view of the remarks in section I and hence it may be axiomatically assumed that the properties of the unknow [...] 1. INTRODUCTION It was the late Lord Rutherford (1) who remarked in the course of his presidential address to the Royal Society (1930) that the Raman effect "has proved and will prove an instrument of great power in the study of the theory of solids." Its universal applicability the simplicity of the technique the precision of the results obtained and he ease of their interpretation make the Ram [...] a general blackening of the photographic plate due to diffuse general illumination inside the spectrograph as also spurious lines and wings in the immediate vicinity of the exciting line arising from the diffraction effect present in any optical instrument the intensity of which is directly prportional to the brightness of the exciting radiation falling on the slit. [...] It is very significant that no limit or trace of the continuous spectrum of elastic vibrations forming the so-called acoustic branches" of the lattice spectrum of the crystal appears on the plate even with the longest exposures whereas the discrete nature of the atomic vibration spetrum in the upper ranges of frequency is clearly manifested in the ;second otder Raman effect. [...] The study of the effect of temperature on the Raman spectra of ammnium halides offers a means of settling two fundamental issues connected with thesa solids namely (1) behaviour of the NH ions in the neighbouhood of the transition temperature and (2) the nature of the lattice spetrum in which NH4 ions oscillate as single units.
technology medicine science
Pages
235
Published in
India
SARF Document ID
sarf.145733
Segment Pages Author Actions
Frontmatter
i-iii unknown view
36th Indian Science Congress Allahabad 1949 Section of Mathematics
1-8 unknown view
36th Indian Science Congress Allahabad 1949 Section of Statistics
9-26 unknown view
36th Indian Science Congress Allahabad 1949. Section of Physics
27-42 unknown view
36th Indian Science Congress Allahabad 1949 Section of Chemistry
43-62 unknown view
Section of Geology and Geography
63-86 unknown view
Section of Botany
87-110 unknown view
36th Indian Science Congress Allahabad 1949 Section of Zoology and Entomology
111-138 unknown view
Section of Anthropology & Archaeology Suggestions for Improvement in Methods of Dating
139-154 unknown view
36th Indian Science Congress Allahabad I949. Section of Medical and Veterinary Sciences
155-172 unknown view
Section of Agriculture
173-186 unknown view
Section of Physiology
187-201 unknown view
Section of Psychology and Educational Science
202-220 unknown view
Section of Engineering and Metallurgy
221-230 unknown view
Backmatter
i-ii unknown view

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