A lightning storm is the source of emission of electromagnetic waves spanning a broad frequency range from radio waves to gamma-rays. Very-high-frequency (VHF) activity (of 1–10 m wavelength) is particularly useful for the study of discharges during their formation stage. A VHF interferometer...
Atomic radio is essentially an idea that makes use of how special "Rydberg" atoms can modulate a laser beam when radio waves pass through them. A photo diode is then used to optically detect the radio wave from the modulated laser. This way of receiving requires no traditional radio circuits...
Hand held device for distance measurement, either using a laser light source, ultrasound or high frequency radio waves has a flexible cone shaped end arrangement that enables creation of up to three reference end stops 来自 掌桥科研 喜欢 0 阅读量: 25 ...
Waves of different types (frequencies) are passed through a magnetic field to modulate the waves and bundle the waves. The waves are reflected and an object imaged after which the waves are demodulated to yield an object image.HEISE, GEB. HERING...
摘要: The acoustic waves reported by Bates et al. are directly observed by means of a solid‐dielectric capacitancemicrophone. The initial time development of the pressure wave indicates that the vibration–vibration energy transfer rate in SF6 is not less than 2×106 sec1·Torr1.关键词:...
Results in [23] proved that the elastic waves generated by PZT (lead zirconate titanate) could be accurately simulated using laser excitation. Even if the laser excitation can generate merely a magnitude up to a few of g, it is very useful source for pyroshock simulation thanks to very wide...
Water, methane, and ammonia are commonly considered to be the key components of the interiors of Uranus and Neptune. Modelling the planets’ internal structure, evolution, and dynamo heavily relies on the properties of the complex mixtures with uncertain exact composition in their deep interiors. Th...
Laser action has been observed in all forms of matter and spans a spectrum ranging from radiowaves to X-rays. This book provides a concise, readily accessi... M Weber - 《Optical Materials》 被引量: 762发表: 1986年 CRC handbook of laser science and technology. Volume 4. Optical materials...
maser at Columbia University. The ammonia maser, the first device based on Einstein’s predictions, obtains the first amplification and generation of electromagnetic waves by stimulated emission. The maser radiates at a wavelength of a little more than 1 cm and generates approximately 10 nW of ...
Photoacoustic imaging is based on the generation of acoustic waves in a semitransparent sample after illumination with short pulses of light or radio waves... P Burgholzer,H Grün,M Haltmeier,... - Photons Plus Ultrasound: Imaging & Sensing: the Eighth Conference on Biomedical Thermoacoustics 被...