1. In a Scanning Tunneling Microscope, what is the current between the tip and surface caused by? 2. What type of interference (constructive or destructive) results in the diffraction pattern in X- ray diffraction? 3. Why are electrons used instead of light in Transmission Electron Microscopy?
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- I am really uncertain of the geometry I did with this problem how do I solve it3. What are K,L and M lines you discovered in the Moseley's law experi- ment ? 4. What is the Duane Hunt maximum x-ray frequency of a excitation voltage V = 6kV ? 5. Draw a basic shape of the x-ray absorption spectrum of a generic element, denote the Band a lines along with Duane-Hunt cutoff4. A laser with a power of 1.0 mW has a beam radius of 1.0 mm. What is the peak value of the electric field in that beam?a. 490 V/mb. 840 V/mc. 65 V/md. 120 V/me. 22 V/m
- 4. In an electron microscope electrons are accelerated by a 1500-V potential drop to a velocity of approximately 1x108 m/s. a) Calculate the de Broglie wavelength of these electrons. b) What size objects should such a microscope be able to visualize? Explain your answer. c) If you desire a minimum uncertainty in the position of the electrons in your microscope of 1 Å, what is the maximum uncertainty that is acceptable in the momentum and velocity of the electrons?..6. Given that the work function for a certain metal surface is 2.3 eV, find the stopping potential for photoelectrons ejected using incident light frequency of 7.0x1014 Hz. A. 0.9 volts B. 0.8 volts C. 0.3 volts D. 0.6 voltsWhich has the larger de Broglie wavelength, a 0.50 kg ball moving with a speed of 25 m/s or an electron traveling at 2/3 the speed of light? The mass of an electron is 9.11 x 10-31 kg and the speed of light is 3 x 108 m/s. Select one: a. It could be either, depending on the circumstances. b. The ball c. The electron