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Lecture Comments (11)

0 answers

Post by Jamal Tischler on May 15, 2015

At waves, the amplitude is just half of the total hight.
Image: http://commons.wikimedia.org/wiki/File:Sine_wave_amplitude.svg

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Post by Muhammad Chauhan on October 13, 2014

Number of orbitals in a level for n=2 is not 2 -- it is 4. Number of orbitals in a level can be found by n^2.

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Post by Shahram Ahmadi N. Emran on July 10, 2013

very good explanations

0 answers

Post by Shahram Ahmadi N. Emran on July 10, 2013

0 can't be the principle quantum number..

0 answers

Post by Shahram Ahmadi N. Emran on July 10, 2013

calculate the wavelength , in nanometers, of light emitted by a hydrogen atom when its electron falls from n=7 to the n=4 principle energy level. recall that energy level of the H atom are given by E=-2.18 x 10 to-18 J(1/nto2) and (c =3.0 x 10to 8 m/s; h=6.63x 10 to-34J s)

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Post by Shahram Ahmadi N. Emran on July 10, 2013

Thanks

0 answers

Post by Norman Cervantes on January 15, 2013

very good explanations

1 answer

Last reply by: Muhammad Chauhan
Mon Oct 13, 2014 6:02 PM

Post by Nigel Hessing on November 15, 2011

0 can't be the principle quantum number..

0 answers

Post by mark turner on April 26, 2010

calculate the wavelength , in nanometers, of light emitted by a hydrogen atom when its electron falls from n=7 to the n=4 principle energy level. recall that energy level of the H atom are given by E=-2.18 x 10 to-18 J(1/nto2) and (c =3.0 x 10to 8 m/s; h=6.63x 10 to-34J s)

0 answers

Post by mark turner on April 26, 2010

calculate the wavelength , in nanometers, of light emitted by a hydrogen atom when its electron falls from n=7 to the n=4 principle energy level. recall that energy level of the H atom are given by E=-2.18 x 10 to-18 J(1/nto2) and (c =3.0 x 10to 8 m/s; h=6.63x 10 to-34J s)

Electromagnetic Radiation Quantum Theory

  • ln = c

  • Electromagnetic spectrum: radio waves to X-rays

  • H atom has regular line spectrum

  • Quantum theory – Planck – explains black-body radiation

  • Photoelectric effect explained by quantum theory – Einstein

  • Bohr’s hydrogen atom ideas; explain line spectrum

  • Uncertainty principle – Heisenberg

  • Particles can be waves – De Broglie

  • Learn the 4 quantum numbers and the connections among them

Electromagnetic Radiation Quantum Theory

Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.

  • Intro 0:00
  • Waves and Their Characteristics 0:32
    • Amplitude, Trough, Crest
    • Wavelength
    • Frequency
    • Velocity (Speed of Light)
  • Electromagnetic Radiation 5:10
    • Gamma Rays and X-Rays
    • Visible Light
    • Infrared
    • Radio Waves
  • Spectra and Spectroscopy 7:58
  • Hydrogen Atom Spectrum 10:13
    • Emission Spectrum vs Absorption Spectrum
    • Rydberg Formula
  • Planck's Quantum Theory 16:55
    • Black Body Radiation and Quanta
  • Photoelectric Effect 23:29
  • Bohr's Theory of the Hydrogen Atom 28:20
    • Ground State
    • Excited State
  • Heisenberg and the Uncertainty Principle 34:48
  • De Broglie and the Wave Nature of Particles 40:07
  • Principle Quantum Number 44:05
  • First Quantum Number 45:46
  • m1 Quantum Number 51:00
  • Spin Quantum Number 54:28
  • Pauli Principle 54:58
  • Additional Example 1