a) using Ao At = 1, show that AE At = (h/2x) b) using Az Ak = 1, show that Az Ap = (h/2r) c) Since momentum p = mass times velocity = mv, use another of Einstein's favorite equations, E = mc² to write p = E/cfor a photon or electron, and using the Einstein-Planck Equation obtain de Broglie's formula for momentum.

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Chapter1: Units, Trigonometry. And Vectors
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Einstein won the Nobel Prize in physics for the photo-electric effect in 1924 for his
interpretation of the photoelectric effect in a paper published in 1905 when he was 26
years old. This work resulted in the Einstein-Planck Equation for the energy of a photon:
E = hv = (h/2n) 0
Similarly, Louis de Broglie, in his 1924 Ph.D. thesis proposed that just as light (and other
electromagnetic waves) has both wave-like and particle-like properties, matter (and in
particular electrons) has wave-like properties and that the momentum p of these matter
waves have a momentum given by:
p= h/2 = (h/2z)k, where, as in class, k = 2wn
In both equations, h is Planck's constant = 6.62607004 x 1034 m²kg/s
a) using Ao At = 1, show that AE At = (h/2n)
b) using Az Ak = 1, show that Az Ap = (h/2R)
c) Since momentum p = mass times velocity = mv, use another of Einstein's favorite
equations, E = mc? to write p = E/c for a photon or electron, and using the Einstein-Planck
Equation obtain de Broglie's formula for momentum.
Transcribed Image Text:Einstein won the Nobel Prize in physics for the photo-electric effect in 1924 for his interpretation of the photoelectric effect in a paper published in 1905 when he was 26 years old. This work resulted in the Einstein-Planck Equation for the energy of a photon: E = hv = (h/2n) 0 Similarly, Louis de Broglie, in his 1924 Ph.D. thesis proposed that just as light (and other electromagnetic waves) has both wave-like and particle-like properties, matter (and in particular electrons) has wave-like properties and that the momentum p of these matter waves have a momentum given by: p= h/2 = (h/2z)k, where, as in class, k = 2wn In both equations, h is Planck's constant = 6.62607004 x 1034 m²kg/s a) using Ao At = 1, show that AE At = (h/2n) b) using Az Ak = 1, show that Az Ap = (h/2R) c) Since momentum p = mass times velocity = mv, use another of Einstein's favorite equations, E = mc? to write p = E/c for a photon or electron, and using the Einstein-Planck Equation obtain de Broglie's formula for momentum.
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