Answered: Q': The ratio of population of two…

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Transcribed Image Text:Q': The ratio of population of two energy levels is 1.059 x 10-30. What is the wavelength emitted at 300 k Q: The half-width of the gain profile of a He-Ne laser material is 2 x 10-3 nm and length of the cavity is 30 cm. how many longitudinal mode can be excited .The emission of He-Ne laser is 6.328 A° Q°: The line width of a helium-neon laser is 10° Hz. The operating wavelength is 632.8 mm and the power is 1mW. a. How many photons are emitted per second? b. If the output beam is 1mm in diameter, at what temperature would a blackbody have to be in order to emit the same number of photon from an equal area and over the same frequency interval as the laser? sản

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