From debrogile theory
lamda = h/ sqrt 2 m eV
sqrt 2 meV= h/ lamda
2 meV = h^2/ lamda^2
V = h^2/ 2 me lamda^2
= (6.63* 10^-34)^2 / 2 (9.1* 10^-31 )(1.6* 10^-19)(0.85 * 10^-9)^2
=2.1 V
Constants Period A scientist wants to use an electron microscope to observe details on the order...
Constants Periodic Table A scientist wants to use an electron microscope to observe details on the order of 0.80 nm Part A Through what potential difference must the electrons be accelerated from rest so that they have a de Broglie wavelength of this magnitude? Express your answer using two significant figures. V AE O ? V = V Submit Request Answer Provide Feedback Next >
Item 4 Take h to have an exact value of 6.63 x 10-34 Js for significant figure purposes, and use hc= 1.24 x 10 eV nm (three significant figures). When light of wavelength of 250 min is incident on a metal surface, the maximum speed of the photoelectrons is 5.0x105 m/s Part A What is the work function of the metal in eV? Express your answer using two significant figures. IVO AED ? eV Submit Request Answer Provide Feedback Item...
The electrons in an electron microscope have speed of 4.7 Mm/s . Part A Find their de Broglie wavelength. Express your answer to two significant figures and include the appropriate units.
Constants Periodic Table An electron is accelerated from rest through a potential difference of 50 V Part A What is the de Broglie wavelength of the electron? | ΑΣΦ 6 και ο ? 13 nen Submit Request Answer Next > Provide Feedback
Constants Part A An electron is accelerated horizontally from rest by a potential difference of 2100 V. It then passes between two horizontal plates 6.5 cm long and 1.3 cm apart that have a potential difference of 240 V (refer to (Figure 1) At what angle will the electron be traveling after it passes between the plates? Express your answer to two significant figures and include the appropriate units. Nνα ΑΣφ ? 0 = Request Answer Submit Return to Assignment...
Through what potential difference AV must electrons be accelerated (from rest) so that they will have the same wavelength as an X-ray of wavelength 0.145 nm ? Use 6.63x10-34 J·s for Planck's constant, 9.11x10-31 kg for the mass of an electron, and 1.60x10-19 C for the charge on an electron. Express your answer using three significant figures. ► View Available Hint(s) ΙΙ ΑΣΦ ? AVDelta V = V
An electron is accelerated from rest by a potential difference of 38.5 V for a distance of 8.5 cm. Determine the de Broglie wavelength of the electron. Give your answer in picometers (pm) and with 3 significant figures.
An electron is accelerated from rest by a potential difference of 38.5 V for a distance of 11.5 cm. Determine the de Broglie wavelength of the electron. Give your answer in picometers (pm) and with 3 significant figures.
HW 2: Electric Potential Problem 21.7 Review 1 Constants Part A A proton has been accelerated from rest through a potential difference of-1100 V . What is the proton's kinetic energy, in electron volts? Express your answer using three significant figures. eV Submit Request Answer Part B What is the proton's kinetic energy, in joules? Express your answer using three significant figures. Submit Request Answer KfW 2: Electric Potential Problem 21.7 Part B What is the proton's kinetic energy, in...
UN 6 of 17 Constants Part Consider a beam of electrons in a vacuum, passing through a very narrow slit of width 2.00 pm. The electrons then head toward an array of detectors a distance 1.076 m away. These detectors indicate a diffraction pattern, with a broad maximum of electron intensity (i.e., the number of electrons received in a certain area over a certain period of time) with minima of electron intensity on either side, spaced 0.524 cm from the...