It is not possible to see very small objects, such as viruses, using an ordinary light microscope. An electron microscope can view such objects using an electron beam instead of a light beam. Electrom microscopy has proved invaluable for investigations of viruses, cell membranes and subcellular 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 initial velocity v, = vi. As it passes through the regi x = 0 to x = d, the electron experiences acceleration a = ai + aj, where a, and a are constants. For the case v, = 1.91 x 10 m/s, a- 8.21 x 1014 m/s?, and a, = 1.73 x 1015 m/s?, determine the following at x = d = 0.0100 m. (a) the position of the electron Y, = m (b) the velocity of the electron m/s î + m/s j (c) the speed of the electron |v, = m/s (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 microscope. An electron microscope can view such objects using an electron beam instead of a light beam. Electrom microscopy has proved invaluable for investigations of viruses, cell membranes and subcellular 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 initial velocity v, = vi. As it passes through the regi x = 0 to x = d, the electron experiences acceleration a = ai + aj, where a, and a are constants. For the case v, = 1.91 x 10 m/s, a- 8.21 x 1014 m/s?, and a, = 1.73 x 1015 m/s?, determine the following at x = d = 0.0100 m. (a) the position of the electron Y, = m (b) the velocity of the electron m/s î + m/s j (c) the speed of the electron |v, = m/s (d) the direction of travel of the electron (i.e. the angle between its velocity and the x axis)

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter3: Motion In Two Dimensions

Section: Chapter Questions

Problem 4P: It is not possible to see very small objects, such as viruses, using an ordinary light microscope....

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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 beam instead of a light beam. Electron microscopy has proved invaluable for investigations of viruses, cell membranes and subcellular 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 initial velocity vi=vii. As it passes through the region x = 0 to x = d, the electron experiences acceleration a(t)=axi+ayj, where ax and ay are constants. For the case vi = 1.80 107 m/s, ax = 8.00 1014 m/s2, and ay = 1.60 1015 m/s2 determine at x = d = 0.010 0 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).
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