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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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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
Express in (or or if more appropriate):
a. The kinetic energy of an electron moving with a speed of .
b. The potential energy of an electron and a proton apart.
c. The kinetic energy of a proton that has accelerated from rest through a potential difference of .
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?
The wavelengths in the hydrogen spectrum with m=1 form a series of spectral lines called the Lyman series. Calculate the wavelengths of the first four members of the Lyman series
Particle A has half the mass and twice the speed of particle B. Is the momentum pA less than, greater than, or equal to pB? Explain.
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