It is not possible to see very small objects, such as viruses, using an ordinary light microscope. An electron microscope, however, can view such objects using an electron bean instead of a light beam. Electron microscopy has proved invaluable for investigations of viruses, cell membranes and sub-cellular structures, bacterial surfaces, visual receptors, chloroplasts, and the contractile properties of muscles. The “lenses” of an electron microscope consist of electric and magnetic fields that control the electron beam. As an example of the manipulation of an electron beam, consider an electron traveling away from the origin along the x axis in the xy plane with an initial velocity magnitude of 1.80 x 107 m/s. As it passes through the region x = 0 to x = d, the electron experiences a constant acceleration where ax = 8.00 x 10^14 m/s2, and ay = 1.60 x 10^15 m/s2. Determine at x = d = 0.0100 m (a) the position of the electron, (b) the velocity of the electron, (c) the speed of the electron, and (d) the direction of travel of the electron (i.e. the angle between its velocity and the x axis)
It is not possible to see very small objects, such as viruses, using an ordinary light...
Also write the MATLAB cosde of the answers Objects smaller than the wavelengths of visible light are a staple of contemporary science and technology. Biologists study single molecules of protein or DNA; materials scientists examine atomic-scale flaws in crystals; microelectronics engineers lay out circuit patterns only a few tenths of atoms thick. Until recently, this minute world could be seen only by cumbersome, often destructive methods, such as electron microscopy and X-ray diffraction. It lay beyond the reach of any...
(cach question: 1 point) 1) If you see a red leaf, what color(s) of light in the visible light spectrum is/are being reflected? A) red B) all colors except red C) all colors D) no colors Answer: 2) permit CO2 to enter the leaf and O2 to escape. A) Mesophyll cells B) Thylakoids C) Stomata D) Chloroplasts Answer: 3) Chlorophyll is found in which part of the plant cell? A) stroma B) cytoplasm C) thylakoid D) plasma membrane Answer: 4)...