In order to achieve population inversion between two states that are separated by an energy difference of 3.5 eV, what wavelength of pumping light should be used?
Answer to relevant QuestionsLight of wavelength 340 nm is incident on a metal surface and ejects electrons that have a maximum speed of 3.5 x 105 m/s. (a) What is the work function of the metal? (b) What is its stopping voltage? (c) What is its ...What is the minimum energy of a thermal oscillator in a blackbody producing radiation at λmax at a temperature of 212oF? A laser requires a metastable state that is a relatively long- lived excited atomic state. What is the uncertainly in the energy of the metastable state compared to non-metastable excited states? (a) What is the de Broglie wavelength of the Earth in its orbit about the Sun? (b) Treating the Earth as a de Broglie wave in a large “gravitational” atom, what would be the principal quantum number, n, of its orbit? ...Draw the ground state energy-level diagrams like those in Fig. 28.8 for (a) Nitrogen (N) and (b) Potassium (K).
Post your question