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- In an experiment of analysis of bovine serum albumin the spectrophotometer will be set to measure the light absorbed at 595 nm only, rather than a variety of different wavelengths of light. If you have measured the light absorbed at 580 nm for all of samples instead, how does it affect your results and consequently final result? Explain your answers in details.A typical incandescent lightbulb emits approximately 3 x 1018 visible-light photons per second. Your eye, when it is fully dark adapted, can barely see the light from an incandescent lightbulb 10 km away. How many photons per second are incident at the image point on your retina? The diameter of a dark-adapted pupil is 6 mm.Very short pulses of high-intensity laserbeams are used to repair detached portions of the retina of the eye. Thebrief pulses of energy absorbed by the retina weld the detached portionsback into place. In one such procedure, a laser beam has a wavelengthof 810 nm and delivers 250 mW of power spread over a circularspot 510 mm in diameter. The vitreous humor (the transparent fluid thatfills most of the eye) has an index of refraction of 1.34. If the laser pulses are each 1.50 ms long, how much energy is delivered to the retina with each pulse?
- The field of view (FOV) is the entire circular image we see when looking into the eyepiece. The diameter of the FOV gets smaller as we increase magnification. It can be measured by using a stage micrometer like a ruler, measuring from edge to edge. Notice that the stage micrometer is 1000 microns (µm) in length, and the field of view under the lowest magnification is 5000 µm. Describe how we measure it?What does the abbreviaton "EI" stand for? Group of answer choices Aearly ionization Belectron imaging Celectromagnetic induction Delectron intensity Eelectron ionization Which of the following transitions will exhibit the shortest wavelength in the UV-Vis spectrum? Group of answer choices An to p* Bs to s* Cp to s* Dn to s* Ep to p*Suppose you measure the scanning (4x) field of vision diameter with a stage micrometer and it is 2 mm. If high power is 40X, and gives 10X more magnification than scanning power, how big will the diameter of the field of vision be using high power?
- The cone system and the rod system: differ in response saturation at high levels of illumination are equally devastating in case of damage O are equally specialized for sensitivity of photon capture O mediate scotopic and photopic vision, respectively Back Next Ne er submit passwordshiough Gooo msThe human retina has three types of receptor cones, eachsensitive to a different range of wavelengths of visible light,as shown in this figure (the colors are merely to differentiatethe three curves from one another; they do not indicate theactual colors represented by each curve):(a) Estimate the energies of photons with wavelengths at themaximum for each type of cone. (b) The color of the sky is dueto scattering of solar light by the molecules of the atmosphere.Lord Rayleigh was one of the first to study scattering of thiskind. He showed that the amount of scattering for very smallparticles such as molecules is inversely proportional to thefourth power of the wavelength. Estimate the ratio of the scatteringefficiency of light at the wavelength of the maximumfor the “blue” cones, as compared with that for the “green”cones. (c) Explain why the sky appears blue even though allwavelengths of solar light are scattered by the atmosphereUltrasound imaging depends on the creation and detection of ultrasound pulses by a transducer placed in contact with the patient’s body. Explain the process leading from the emission of an ultrasound pulse by the transducer to the acquisition of echo data which can lead to the production of an image. Suggested word count 300.
- Which of the following factors affect the specific rotation of an optically active substance? Question 1 options: Length of the sample tube Concentration of the substance Temperature Wavelength of the light All of theseThe basic component of a fluoroscopic x-ray system suitable for interventional procedures consist of a generator,x-ray tube and housing including collimator and filtration,patient table,anti-scatter grid and an image receptor.Describe the key design features and function of each of these component and briefly discuss the role of automatic brightness controlIdentify all accurate statements: Using a neutral excitation filter can reduce photobleaching. However… A.This can reduce the fluorescence emitted. B.This only delays photobleaching if exposure to light is prolonged. C.This can introduce aberrations in the image. D.This may be toxic to the sample to be observed.
