Unformatted text preview: So, macroscopic objects such as baseballs or planets that had heavy masses would be expected to have wavelengths that were extremely small, so small their wavelike behavior would be undetectable, and would go unnoticed. However, microscopic objects such as electrons that had masses that were minuscule would be expected to have wavelengths that were substantial, and their wavelike behavior would be detectable and could not be ignored. Exercise—de Broglie equation 1. Calculate the de Broglie wavelength in meters of a tennis ball with a mass of 9.00 x 10 –2 kg that has a kinetic energy of 6.53 x 10 7 J. (Ans. 1.93 x 10 –37 m) 2. What must the kinetic energy of a helium atom with a mass of 6.65 x 10 –27 kg be so that it has a de Broglie wavelength of 2.80 x 10 –12 m? (Ans. 4.21 x 10 –18 J)...
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This note was uploaded on 11/20/2010 for the course CHEMISTRY Chem 1A Di taught by Professor Rameshdarasasingham during the Spring '10 term at UC Irvine.
- Spring '10