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

Modern Physics

3rd Edition

ISBN:9781111794378

Author:Raymond A. Serway, Clement J. Moses, Curt A. Moyer

Publisher:Raymond A. Serway, Clement J. Moses, Curt A. Moyer

Chapter12: The Solid State

Section: Chapter Questions

Problem 20P

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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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