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Chapter 37: Q. 3 (page 1081)
Thomson observed deflection of the cathode-ray particles due to magnetic and electric fields, but there was no observed deflection due to gravity. Why not?
The required statement is explained below.
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Explain why the observation of alpha particles scattered at very large angles led Rutherford to reject Thomson’s model of the atom and to propose a nuclear model.
Once Thomson showed that atoms consist of very light negative electrons and a much more massive positive charge, why didn’t physicists immediately consider a solar-system model of electrons orbiting a positive nucleus? Why would physicists in object to such a model?
Figure 37.7 identified the wavelengths of four lines in the Balmer series of hydrogen.
a. Determine the Balmer formula n and m values for these wavelengths.
b. Predict the wavelength of the fifth line in the spectrum.
a. Summarize the experimental evidence prior to the research of Thomson by which you might conclude that cathode rays are some kind of particle.
b. Summarize the experimental evidence prior to the research of Thomson by which you might conclude that cathode rays are some kind of wave.
A ceramic cube on each side radiates heat at . At what wavelength ,in , does its emission spectrum peak? Assume
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