Chapter 38: Q. 35 (page 1115)
What is the third-longest wavelength in the absorption spectrum of hydrogen?
Short Answer
The wavelength of the third longest wave is 97.3 nm
Chapter 38: Q. 35 (page 1115)
What is the third-longest wavelength in the absorption spectrum of hydrogen?
The wavelength of the third longest wave is 97.3 nm
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Get started for freeIn the atom interferometer experiment shown in Figure laser cooling techniques were used to cool a dilute vapor of sodium atoms to a temperature of . The ultracold atoms passed through a series of collimating apertures to form the atomic beam you see circling the figure from the left. The standing light waves were created from a laser beam with a wavelength of
a. What is the rms speed of a sodium atom in a gas at this temperature ?
b. By treating the laser beam as if it were a diffraction grating. cakculate the first-order diffraction angle of a sodium atom traveling with the rms speed of part a.
c. allow far apart are points and if the second sanding wave is from the first?
d. Because interference is observed between the two paths, each individual atom is apparently present at both point and point . Describe, in your own words, what this experiment tells you about the nature of matter.
Imagine that the horizontal box of Figure 38.14 is instead oriented vertically. Also imagine the box to be on a neutron star where the gravitational field is so strong that the particle in the box slows significantly, nearly stopping, before it hits the top of the box. Make a qualitative sketch of the n = 3 de Broglie standing wave of a particle in this box.
The charge on a muon-a subatomic particle is -e and its mass 207 times that of an electron-
which is confined in a 15-pm-long, one-dimensional box.
(1 pm = 1 picometer = 10-12 m.)
What is the wavelength, in nm, of the photon emitted in a quantum jump from n=2 to n=1
The cosmic microwave background radiation is light left over from the Big Bang that has been Doppler-shifted to microwave frequencies by the expansion of the universe. It now fills the universe with 450 photons/cm3 at an average frequency of 160 GHz. How much energy from the cosmic microwave background, in MeV, fills a small apartment that has 95 m2 of floor space and 2.5-m-high ceilings?
What is the length of a one-dimensional box in which an electron in the state has the same energy as a photon with a wavelength of ?
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