Unformatted text preview: 1 be the amplitude for an electron to go from the source S through slit 1 and arrive at the point P on the screen. Let Ψ 2 be the amplitude for an electron to go from the source S through slit 2 and arrive at the point P on the screen. If no experiment is done to determine which hole the electron went through then the probability of finding the electron at the point P on the screen is P =  Ψ 1 + Ψ 2  2 = P 1 + P 2 +2Re( Ψ 1 Ψ 2 * ) ≠ P 1 + P 2 and “interference” occurs. If an experiment is performed to determine which hole the electron went through then the probability of finding the electron at the point P on the screen is P = P 1 + P 2 =  Ψ 1  2 +  Ψ 2  2 . Interference! No interference! 1 P Screen Ψ 1 Source Double Slit 2 Ψ 2...
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 Spring '07
 Field
 Physics, Probability, Wavelength, Department of Physics, R. D. Field

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