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Chapter
Interferometric Studies on Apollo 11 and Apollo 12 Lunar Glass Objects
A review of results obtained by an examination with optical interferometry of a variety of glassy objects found in lunar fines from Apollo 11 and 12. Glassy spheres, cylinders, chips and fragments have been ex...
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Article
School Physics
PSSC Physics
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Article
Goethe on Interferometry
I HAVE had occasion recently to re-read Goethe's Theory of Colours (1810) and have found that he described the nature of the microtopographical interference pattern given by a crystal surface, presumably from the...
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Article
Introductory Optics
Elementary Wave Optics
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Article
Interferometric Examination of Tektites
THERE exists on the Moon a large number of craters many of which may be meteoric in origin. And if—as is often suggested—tektites result from meteoric impact there may be large numbers scattered over the lunar...
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Article
Student's Interferometry
Interferometry
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Article
Electron Microscopes
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Article
Dislocations
Dislocations
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Article
Resemblance between Macro-impact with a Great Meteorite and Micro-impact with a Drop or Sphere
RECENTLY G. G. Johnson et al.1have computed and shown a height contour map (extending over a diameter of 33 miles) for the crater and surroundings of the meteoritic impact crater, Ries Kessel, in Germany (15 mile...
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Article
A Compendium of Physics
American Institute of Physics Handbook
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Article
Short Reviews
Electronic Properties of Diamonds
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Article
Technological Importance of Industrial Diamond
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Article
A Notable Growth Spiral on Synthetic Diamond
IN previous communications1 it was reported that a few growth spirals of step height of some 100 Å. were observed on what were otherwise very smooth cubic faces of synthetic diamonds. These spirals were found onl...
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Article
Isotope Enrichment in a Continuous Feed Process
IN order to secure definite experimental evidence as to the validity or otherwise of my earlier tentative conjecture that there might possibly be an appreciable isotope enrichment in old electrolytic tin-plati...
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Article
Symmetry of Snow Crystals
THE frequently portrayed beautiful six-ray star-shaped crystals of snow have long been quoted as outstanding examples of well-developed crystal forms. Despite an infinite variety in the patterns which appear, ...
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Article
A Conjectured Electrolytic Enrichment of Tin Isotopes
IT is, of course, a matter of history that a considerable enrichment of heavy water was found in long-used commercial electrolytic cells.
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Article
Dr. P. Grodzinski
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Article
Shadow Microscopy for Measurement of Height
THIS note describes a simple optical microscope shadow technique which permits measurement to be made of the heights of small objects such as particles, spores, steps on surfaces, etc., and also reveals qualit...
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Article
Evaluation of Small Radii of Curvature using the Light-Profile Microscope
THE light-profile microscope described by Tolansky1 is being applied in this laboratory to several fields, including the study of features of crystal growth2, the measurement of the thickness of thin film3 and ev...
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Article
Thin-Film Interferometric Techniques for High-Magnification Topographical Studies
THIS communication describes a simple interferometric technique for examination of surface topography without the use of optical flats, the particular advantage being the possibility of using high magnificatio...
