Ordinary X-ray photographs cannot produce sharp images of internal organs whose densities are not varying significantly from their surroundings. What technique overcomes this problem?
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- ) The Rayleigh number is defined as gpaAT® RaThe figure below depicts spectral reflectance measurements for three different materials: a green leaf from a healthy plant, a sheet of shiny blue paper, and the palm of a human hand. The measurements are labeled 1 (black line), 2 (red line), and 3 (blue line). Match the measurements to the most appropriate material typeA light beam of wavelength λ= 500 nm, beam diameter 5 mm and intensity I is propagating in a medium. The absorption cross section of the medium is 2.3×10-19 cm-2 and upper-level lifetime is 10 µs. Calculate the power of the light beam that make the absorption coefficient of the medium (α) decays to 50% of its initial value (αo).
- The x-ray linear attenuation coefficient of water at 40 keV is ?????? = 0.27 ??−1.The CT number of a tumor reported by a CT scanner is 60 HU. Calculate the linear attenuation coefficient of the tumor tissue ?Although electron microscopy is the preferred technique for measuring high resolution scientific images, scanning probe microscopy can utilize the smallness of wavelengths to create an image of particles not visible through regular microscopes. In general, the wavelength of the scanning light must be at least as small as the item being scanned in order to detect the presence of the item. The new novel coronavirus has a size of 60 nm to 140 nm, with an average size of 125 nm. Red blood cell Particles ihered Coronavinu by masks Bacillus Bacteria PM2.5 0.007um 0.1um 0.5pm 2.5um 7um 10um #seetheair Part A Which scanning light sources could detect a single coronavirus? (select all that apply) O ultra-violet microscopy O x-ray microscopy O a regular (visible light) microscope O infrared spectroscopyHow does tan ^-1 work when given x and y?