Apparatus to measure the velocity of sou
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A. Van Itterbeek; G.J. Van Den Berg; W. Limburg
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Article
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1954
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Elsevier Science
β 179 KB
A description is given of the apparatus used in order to measure the velocity of sound in liquid hydrogen and helium with the optical method, indicated by D e b y e and by B i q u a r d. The light beam enters the cryostat at the top and passes an evacuated glass tube, shut off at the bottom by a pla