What velocity must an electron travel with for its kinetic energy to equal the energy of a photon with a wavelength of λ = 520 nm
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Q: What is the energy of an electron with wavelength 680nm
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Q: What is the wavelength, in nm, of an electron travelling at 10% of the speed of light?
A: The velocity of the electron is 10% of the speed of light. That is, v=101003×108m/s=3×107 m/s
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- A machine for examining small packages uses X –rays produced from electrons accelerated by a 50 kV potential . The wavelength of the X rays is (a) 2.48 x 10-11 m (b) 2.48 x 10-8 m (c) 1.49 x 10-7 m (d) 1.55 x 10-11 m (e) 2.48 x 10-9 mAn electron, traveling at a speed of 9.00 x 107 m/s, strikes the target of an X-ray tube. Upon impact, the electron decelerates to one-quarter of its original speed, an X-ray photon being emitted in the process. What is the wavelength of the photon? 2.67 x 10-11 m 3.76 x 10-11 m 2.88 x 10-11 m 5.34 x 10-11 m 5.75 x 10-11 mA photon of wavelength 200 nm is scattered by an electron that is initially at rest. Which one of the following statements concerning the wavelength of the scattered photon is true? Question 25 options: The wavelength is zero nm. The wavelength is greater than 200 nm. The wavelength is 200 nm. The wavelength is less than 200 nm, The wavelength is less than 100 nm but greater than zero.
- (a) If the wavelength of an electron is 4.77 ✕ 10−7 m, how fast is it moving? ______ km/s (b) If the electron has a speed equal to 3.50 ✕ 106 m/s, what is its wavelength? ______m.A proton has a de Broglie wavelength of 81.20 fm. What is its speed? m/sA beam of 400 nm light is adjusted to have the same intensity as a beam of 600 nm light. How does the number of photons in the 400nm beam, N400 compare to the number of photons, N600 in the 600 nm beam. Question 5 options: N400 = 2*N600 N400 = 32600 N400 = N600 N400 = 23600 N400 = 2600 None of the other responses are correct.
- For light with a wavelength of 350 nm and with an intensity of /= 10-8 W/m², what is the number of photons/(m²s) in the light beam?Photons of wavelength 248.6 nm strike a metal whose work function is 3.5 eV. What is the KE of the most energetic photoelectron? a) 1.5 eV b) 2.5 eV c) 3.5 eV d) none of these.What is the kinetic energy of an electron in a TEM having a 0.0100-nm wavelength?
- Light of wavelength > light. = 5.34 × 10¹¹m is incident on an electron and undergoes Compton scattering at an angle of 0 = 13.1° from the direction of the incident What is the magnitude of the momentum of the scattered photon? ×10-25 Js/mA metal has a work function of 3.1eV and is illuminated by light of wavelength A = 320 nm. What is the maximum velocity of the photoelectrons emitted? Select one: а. 2.7 x 106 m/s b. 3.2 x 10' m/s С. 5.9 x 105 m/s O d. 5.24 x 105 m/sSuppose a linear accelerator (linac) creates a X-ray beam where every individual photon has an energy of 19 MeV. If 3x1010 photons are produced over 90x10-15 s, as measured through an area of 3.1 m², determine the intensity of the X-ray beam. I = B W/m²