What is the Doppler broadening in the 21 cm line in an interstellar gas cloud (100 K) composed of neutral hydrogen atoms?
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What is the Doppler broadening in the 21 cm line in an interstellar gas cloud (100 K) composed of neutral hydrogen atoms? Answer in kHz.
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- t. 92 E, DATA 9,= + 1, SMC 92=+2,3 MC L=13 cm WHERE THE E=0 ? ofHow to find the intensity for this promblem please?The difference between the sight of ligtening and the sound of thunder is measured to be 2 seconds. The SPL at the same location where 2 seconds was measured is 85dB re 20uPa. What is the distance to the ligtening?