Which experimental demonstration of quantum principles was described by Physics World as “the most beautiful experiment” of all time? Explain.
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Which experimental demonstration of quantum principles was described by Physics World as “the most beautiful experiment” of all time? Explain.
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- 200 5 Wave Packets 6 The Heisenberg Uncertainty Principle 11. Approximately what range of frequencies must be superimposed to create this wave packet? 12. A telecommunication system uses pulses with a duration of 5 ns. a. About how many such pulses can be transmitted per second? b. What is the minimum bandwidth needed to transmit these pulses? 13. Wave packets are shown for particles 1, 2, and 3. MA ^^^^^ M. Particle 1 AMA Particle 2 $(1) Which particle can have its velocity known most precisely? Explain. 1 ps Hollo Aff Particle 31. Louis de Broglie postulated all matter has both a particle and wave nature. The wavelength of any matter wave is given by λ = h/p, where p is the linear momentum p = mv and both p and v are vectors. a) World class marathon runners can run at an average pace of about 3.00 min/km. What is the wavelength, momentum and kinetic energy of a 55 kg runner racing at this average speed? b) What is the uncertainty in the runner's velocity if the position is to be determined within one wavelength?Part II Scattered Photon An x-ray photon of wavelength 0.0177nm produced by this tube leaves the tube and collides elastically with an electron at rest. As a result, the electron recoils and the x-ray is scattered, as shown above. The wavelength of the scattered x-ray photon is .0183 nm. Relativistic effects may be neglected for the electron. (c) How much energy did the photon impart to the electron? (d) How much total momentum did this photon lose? (e) Based on the principle of Compton Scattering derived in class, what is the expected angle at which the photon scatters? Incident Photon Electron
- In an old-fashioned television set, electrons are accelerated through a potential difference of 24.9 kV. What is the de Broglie wavelength of such electrons? (Relativity is not needed.) Number UnitsAn electron, starting from rest, accelerates through a potential difference of 992 V. What is the final de Broglie wavelength of the electron, assuming that its final speed is much less than the speed of light? Number i Units