. Light, a textbook for students who have had one year of physics. Figure 172 LIGHT. this is the case, then to a person moving with the emittingbody the velocity of light should appear to be unequal indifferent directions. Toward P the velocity would be YP =e â v, toward Q it would be YQ = c-fv, and toward R, atright angles to the line QP. it would = \/c2 â v2. Nowrefer to the diagram of the Michelson interferometer, figure 83, remembering that the inter-ference is between two beamsgoing from the diagonal mir-ror EF, one up to AB andback, the other to CD andback. Let the instrument bead
. Light, a textbook for students who have had one year of physics. Figure 172 LIGHT. this is the case, then to a person moving with the emittingbody the velocity of light should appear to be unequal indifferent directions. Toward P the velocity would be YP =e â v, toward Q it would be YQ = c-fv, and toward R, atright angles to the line QP. it would = \/c2 â v2. Nowrefer to the diagram of the Michelson interferometer, figure 83, remembering that the inter-ference is between two beamsgoing from the diagonal mir-ror EF, one up to AB andback, the other to CD andback. Let the instrument beadjusted till these two pathshave exactly the same length,and then suppose the wholeinterferometer to be mountedupon some base which is mov-ing rapidly to the right inFlgure ^ figure 83 with a velocity v. The two paths, in spite of being equal in length, would thennot include the same number of wavelengths, because the veloci-ty of the light, with respect to the interferometer, would bedifferent in different directions. From the diagonal mirror to AB and back, it would be Vc2 â
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectlight, bookyear1921
