A laser beam, 100μm in diameter, is used to digitize a 35cm×42cm radiograph. If each pixel...
A laser beam, 100μm in diameter, is used to digitize a 35cm×42cm
radiograph. If
each pixel is to have dimensions comparable to that of the laser
beam, of how many
pixels is the digitized image composed?
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A laser beam, 100μm in diameter, is used to digitize a 35cm×42cm
radiograph. If
each pixel...
A telescope can be used to enlarge the diameter of a laser beam and limit diffraction...
A telescope can be used to enlarge the diameter of a laser beam and limit diffraction spreading. The laser beam is sent through the telescope in opposite the normal direction and can then be projected onto a satellite or the Moon. If this is done with the Otto Struve telescope, producing a 2.102.10 m diameter beam of 613613 nm light, what is the minimum angular spread of the beam? minimum angular spread: Neglecting atmospheric effects, what is the size of...
In lectures we discussed how bitmap images are stored as a grid of pixel values. Each...
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I have an 8K computer monitor with 7,680 x 4,320 pixels. Each pixel is represented by...
I have an 8K computer monitor with 7,680 x 4,320 pixels. Each pixel is represented by four bytes. How much memory in bytes is my video graphic card required to have to display one frame? A frame is one image that contains 7,680 x 4,320 pixels.
Part A High-power lasers are used to cut and weld materials by focusing the laser beam...
Part A High-power lasers are used to cut and weld materials by focusing the laser beam to a very small spot. This is like using a magnifying lens to focus the sun's light to a small spot that can burn things. As an engineer, you have designed a laser cutting device in which the material to be cut is placed 3.0 cm behind the lens. You have selected a high- power laser with a wavelength of 1.06 um. (This distance...
A helium-neon laser produces a beam of diameter 1.75 mm, delivering 2.90 x 1018 photons/s. Each...
A helium-neon laser produces a beam of diameter 1.75 mm, delivering 2.90 x 1018 photons/s. Each photon has a wavelength of 633 nm (a) Calculate the amplitude of the electric field inside the beam. kV/m (b) Calculate the amplitude of the magnetic field inside the beam (c) If the beam shines perpendicularly onto a perfectly reflecting surface, what force does it exert on the surface? nN (d) If the beam is absorbed by a block of ice at 0°C for...
Very short pulses of high-intensity laser beams are used to repair detached portions of the retina...
Very short pulses of high-intensity laser beams are used to repair detached portions of the retina of the eye. The brief pulses of energy absorbed by the retina welds the detached portion back into place. In one such procedure, a laser beam has a wavelength of 810 nm and delivers 250 mW of power spread over a circular spot 510 μm in diameter. The vitreous humor (the transparent fluid that fills most of the eye) has an index of refraction...
C++ program: The aim of this homework assignment is to practice writing hierarchy of classes. Design...
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Answer the following multiple choice/True False Questions A) Why are CCD images only approximations to the original scene being imaged by your optics? Circle all that apply a) Each pixel records...
Answer the following multiple choice/True False Questions A) Why are CCD images only approximations to the original scene being imaged by your optics? Circle all that apply a) Each pixel records only the total number of photons, not where in the pixel they arrived. accurately report the actual counts in each pixel. scene which were not sampled by the CCD close the shutter and the time the A/D converter counts the electrons in the b) No A/D converter (regardless of...
PROBLEM 2–The wavelength of the laser light used in LASIK ophthalmic surgery is 193 nm. However,...
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A cyclotron is used to produce a beam of high-energy deuterons that then collide with a...
A cyclotron is used to produce a beam of high-energy deuterons that then collide with a target to produce radioactive isotopes for a medical procedure. Deuterons are nuclei of deuterium, an isotope of hydrogen, consisting of one neutron and one proton, with total mass 3.34×10−27kg. The deuterons exit the cyclotron with a kinetic energy of 6.40 MeV . A-What is the speed of the deuterons when they exit? B-If the magnetic field inside the cyclotron is 1.25 T, what is...
In lectures we discussed how bitmap images are stored as a grid of pixel values. Each pixel has a colour value, and colour can be encoded using the RGB encoding scheme. In lectures we also discussed using the RLE compression technique. Examples of the RLE technique being used to compress text were given. Instead of storing every single character individually, if there is a sequential run of identical characters, data on one character is stored along with a count of...
Part A High-power lasers are used to cut and weld materials by focusing the laser beam to a very small spot. This is like using a magnifying lens to focus the sun's light to a small spot that can burn things. As an engineer, you have designed a laser cutting device in which the material to be cut is placed 3.0 cm behind the lens. You have selected a high- power laser with a wavelength of 1.06 um. (This distance...
A helium-neon laser produces a beam of diameter 1.75 mm, delivering 2.90 x 1018 photons/s. Each photon has a wavelength of 633 nm (a) Calculate the amplitude of the electric field inside the beam. kV/m (b) Calculate the amplitude of the magnetic field inside the beam (c) If the beam shines perpendicularly onto a perfectly reflecting surface, what force does it exert on the surface? nN (d) If the beam is absorbed by a block of ice at 0°C for...
Answer the following multiple choice/True False Questions A) Why are CCD images only approximations to the original scene being imaged by your optics? Circle all that apply a) Each pixel records only the total number of photons, not where in the pixel they arrived. accurately report the actual counts in each pixel. scene which were not sampled by the CCD close the shutter and the time the A/D converter counts the electrons in the b) No A/D converter (regardless of...
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