wavelength

  1. R

    Woodward–Fieser rules, caffeine, absorption maximum, λmax, wavelength

    Hey do any of you know how to calculate the the wavelength of the absorption maximum (λmax) in an ultraviolet–visible spectrum of caffeine using the Woodward–Fieser rules? Ist Purin base with 3 Methyl groups. and im using it desolved in water=> so -8 nm in lit. it is around 275 nm and...
  2. R

    Woodward–Fieser rules, caffeine, absorption maximum, λmax, wavelength

    Hey do any of you know how to calculate the the wavelength of the absorption maximum (λmax) in an ultraviolet–visible spectrum of caffeine using the Woodward–Fieser rules? That would be a great help! https://en.wikipedia.org/wiki/Woodward%27s_rules
  3. R

    Woodward–Fieser rules, caffeine, absorption maximum, λmax, wavelength

    Hey do any of you know how to calculate the the wavelength of the absorption maximum (λmax) in an ultraviolet–visible spectrum of caffeine using the Woodward–Fieser rules? That would be a great help! https://en.wikipedia.org/wiki/Woodward%27s_rules Woodward–Fieser rules, caffeine, absorption...
  4. R

    Woodward–Fieser rules caffeine

    Hey do any of you know how to calculate the the wavelength of the absorption maximum (λmax) in an ultraviolet–visible spectrum of caffeine using the Woodward–Fieser rules? That would be a great help! https://en.wikipedia.org/wiki/Woodward%27s_rules
  5. C

    rydberg constant

    After carrying out a spectroscopy experiment I am asked to calculate 2 values of the rydberg constant from my graph of wavenumber against 1/n2. How do I go about doing this? I have error bars so I made 2 lines (1 using the upper error and 1 using the lower errors) and then I calculated 2...
  6. A

    frequency and wavelength question

    question: Calculate the a)frequency and b)wavelength of the emitted photon when an electron drops from n = 4 to n = 2 level in a hydrogen atom answer in back of book: a) 6.17 x 10^14/s b) 486 nm work: for part A i actually get the correct answer except my answer is negative... my setup is...
  7. A

    wavelength question

    can anyone help me with this? cant get the correct answer... ok so the back of my book has the answers to even numbered questions and number 7.18 is listed as having an answer of 1.2 x 10^2 nanometer (uv spectrum) Here is the question: what is the wavelength, in nm, that has an energy content...
  8. M

    finding energy and wavelength of a photon emitted

    Photoelectron spectroscopy applies the principle of the photoelectric effect to study orbital energies of atoms and molecules. High‐energy radiation (usually UV or x‐ray) is absorbed by a sample and an electron is ejected. The orbital energy can be calculated from the known energy of the...
  9. M

    Quantum Theory: Determining the delta E and wavelength of an Electron Transition

    Hi, In my chemistry textbook, there is one example of a question where an electron jumps from one energy level to another, and they ask you to calculate the change in energy and the wavelength of the photon. The sample question explains that you use Bohr's equation first to find delta E (Delta...
  10. S

    wavelength

    Will someone please help with this question? I am not sure I am using the correct formula. The electron in a hydrogen atom, originally in level n=10, undergoes a transition to a lower level by emitting a photon of wavelength 1739nm. What is the final level of the electron? 8...