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from article Quantum solids
Melting curve for solid 3He. (From data of E. R.Grilly, J. Low Temp. Phys., 11:33–52, 1973)
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Image
from article Quantum solids
Changes in the attenuation and speed of sound near 0.2 K for a sample of solid 4He with 27 ppm of 3He impurities. The attenuation is relative to an arbitrary reference value, and the velocity shift, Δv/v, is the fractional change relative to the…
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from article Quantum solids
Variation of the period of a torsion pendulum containing solid 4He as a function of temperature, indicating the decrease in the moment of inertia of the solid below about 0.2 K. The pendulum oscillation amplitude, for these data, was set so that the…
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from article Luminous efficacy
Spectral photopic and scotopic luminous efficacy curves.
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from article Micro-opto-mechanical systems (MOMS)
A simplified MOMS sensor using a reflecting surface on a flexible mount or membrane and the end face of an optical fiber to form an optical interferometer that can sense vibration. The vibration of the flexible membrane allows the reflecting surface…
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from article Micro-opto-mechanical systems (MOMS)
A simplified representation of how a light beam is used to sense minute deflections of a micromachined cantilever in an atomic force microscope. The sharp tip is scanned very close to a surface. The interatomic forces on the tip deflect the…
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from article Endodermis
Transection from part of Zea root illustrating endodermis in relation to contiguous tissues. (After K. Esau, Plant Anatomy, 2d ed., John Wiley and Sons, 1967)
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from article Endodermis
Details of endodermal structure. (a) Diagram of cell showing location of Casparian strip. (b) Cells of endodermis and of ordinary parenchyma before treatment with alcohol. (c) Cells after treatment. Casparian strip is seen only in sectional views in…
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from article X-ray optics
Schematic of a Kirkpatrick-Baez mirror pair (M1, M2). (From A. Sakdinawat and D. Attwood, Nanoscale x-ray imaging, Nature Photonics, 4:840–848, 2010, DOI:10.1038/nphoton.2010.267)
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from article X-ray optics
Schematic of a zone plate, illustrating constructive interference at the focus. The numerical aperture of a zone plate is proportional to the outermost zone width, Δr. (From A. Sakdinawat and D. Attwood, Nanoscale x-ray imaging, Nature Photonics,…
