hv > eq - Rutgers Physics
... that have deposited on it. It is usually adequate to close the circuit mo mentarily, since long heating will destroy the anode. The retarding (or accelerating) potential is obtained from a fixed source and a calibrated re sistive network, which must, however, be checked against a potentiometer. In ...
... that have deposited on it. It is usually adequate to close the circuit mo mentarily, since long heating will destroy the anode. The retarding (or accelerating) potential is obtained from a fixed source and a calibrated re sistive network, which must, however, be checked against a potentiometer. In ...
File
... this effect by Philipp Lenard showed that the speed of the ejected electro ns did not depend on the intensity of the light but its frequency. This could not be explained using Maxwell’s laws and a wave view of light. At the same time Max Planck was studying a seemingly separate problem called black ...
... this effect by Philipp Lenard showed that the speed of the ejected electro ns did not depend on the intensity of the light but its frequency. This could not be explained using Maxwell’s laws and a wave view of light. At the same time Max Planck was studying a seemingly separate problem called black ...
MuRAY detector
... • Other improvements and new features are scheduled for the 2013/14 • Its precise calibration and characterization allowed to set for best performance • In April 2013 we “see” the Vesuvius, our hard playground, for the first time and after few days of data acquisition • Other improvements and new fe ...
... • Other improvements and new features are scheduled for the 2013/14 • Its precise calibration and characterization allowed to set for best performance • In April 2013 we “see” the Vesuvius, our hard playground, for the first time and after few days of data acquisition • Other improvements and new fe ...
Cathode Rays
... The Uchida e/m apparatus is a modern version of Thomson’s apparatus (see Fig. 1). At the heart of the apparatus is a sealed glass globe containing an electron “gun”. The gun consists of two parallel metal "plates" (the cathode and the anode), and a heater contained within the cathode. A high voltage ...
... The Uchida e/m apparatus is a modern version of Thomson’s apparatus (see Fig. 1). At the heart of the apparatus is a sealed glass globe containing an electron “gun”. The gun consists of two parallel metal "plates" (the cathode and the anode), and a heater contained within the cathode. A high voltage ...
Photomultiplier
Photomultiplier tubes (photomultipliers or PMTs for short), members of the class of vacuum tubes, and more specifically vacuum phototubes, are extremely sensitive detectors of light in the ultraviolet, visible, and near-infrared ranges of the electromagnetic spectrum. These detectors multiply the current produced by incident light by as much as 100 million times (i.e., 160 dB), in multiple dynode stages, enabling (for example) individual photons to be detected when the incident flux of light is very low. Unlike most vacuum tubes, they are not obsolete.The combination of high gain, low noise, high frequency response or, equivalently, ultra-fast response, and large area of collection has maintained photomultipliers an essential place in nuclear and particle physics, astronomy, medical diagnostics including blood tests, medical imaging, motion picture film scanning (telecine), radar jamming, and high-end image scanners known as drum scanners. Elements of photomultiplier technology, when integrated differently, are the basis of night vision devices.Semiconductor devices, particularly avalanche photodiodes, are alternatives to photomultipliers; however, photomultipliers are uniquely well-suited for applications requiring low-noise, high-sensitivity detection of light that is imperfectly collimated.