5. Using the Balmer formula calculate the wavelength of the photon when 1=5.
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- Balmer lines are spectral lines of hydrogen when the electron transitions from a higher level to the 2nd level.
- Balmer by trial and error found the wavelengths of the spectral lines and formed the Balmer formula given by,
Here 364.5 nm is the series limit of the Balmer lines and n is the energy level from which the electron falls back to 2.
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- nains nstan 5. A photon of wavelength A has energy E. If its wavelength were doubled, its energy would be A. 4E. В. 2Е. C. ĮE. D. E.9. As the intensity of light increases in the photoelectric effect, the ejected electrona. has a greater velocity d. remains the sameb. loses kinetic energy e. none of the abovec. increases in number4. An alternative development of the Bohr theory begins by assuming that the stationary states are those for which the circumference of the orbit is an integral number of de Broglie wavelengths. (a) Show that this condition leads to standing de Broglie waves around the orbit. (b) Show that this condition gives the angular momentum mvr = nh, used in the Bohr theory.