Intro Spectroscopy
5th Edition
ISBN: 9781305221796
Author: PAVIA
Publisher: Cengage
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A collection of atoms has 20% of the sample in a state 7.60 eV above the ground state. If these emit coherent radiation, what is the wavelength of the laser light produced in nanometers? (c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ∙ s, 1 eV = 1.60 × 10-19 J) Give your answer as a whole number.
A collection of atoms has 20% of the sample in a state 5.9 eV above the ground state. If they emit coherent radiation, what is the wavelength of laser light?
( ) 340 nm
( ) 450 nm
( ) 210 nm
( ) 91 nm
( ) 34 nm
Some of the most powerful lasers are based on the energy levels of neodymium in solids, such as glass, as shown in the figure.
Verify that the 1.17 eV transition produces 1.06 µm radiation: Fill in the blanks for the work done to solve
___a)__________ev m
? = ___________________________________ = 1.06 µm
___b)__________ev
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- The HC1 molecule oscillates at a frequency of 87.0 THz. What is the difference (in eV) between its adjacent energy levels?arrow_forwardWrite the electron configuration for magnesium.arrow_forwardFor an electron in a hydrogen atom in the n=2 state, compute: (a) the angular momentum; (b) the kinetic energy; (c) the potential energy; and (d) the total energy.arrow_forward
- When x - rays of wavelength of 0.129 nm are incident on the surface of a crystal having a structure similar to that of NaCl, a first - order maximum is observed at 8.15°. Calculate the interplanar spacing of the crystal based on this information.arrow_forwardWhat is the kinetic energy of each electron in a beam of electrons if the beam produces a diffraction pattern of a crystal which is similar to that of a beam of 1.00 eV neutrons? (knowing that electron mass is 9.11*10^-31 kg and neutron mass is 1.67*10^-26 kg).arrow_forwardThe binding energies of K-shell and L-shell electrons in copper are 8.979 and 0.951 keV, respectively. If a Ka x ray from copper is incident on a sodium chloride crystal and gives a first-order Bragg reflection at an angle of 74.1° measured relative to parallel planes of sodium atoms, what is the spacing between these parallel planes?arrow_forward
- An electron is orbiting in the n = 3 orbit of an hydrogen atom. It is promoted by absorption of light energy to the n = 4 level. The Rydberg constant is R = 1.097 x 107 m-1. What is the wavelength of the light absorbed? Select one: a. 1.875 μm b. 1.094 μm c. 427 nm d. 763 nmarrow_forwardWhat is the kinetic energy of each electron in a beam of electrons if the beam produces a diffraction pattern of a crystal which is similar to that of a beam of 1.00 eV neutrons? (knowing that electron mass is 9.11*10^-31 kg and neutron mass is 1.67*10^-26 kg). What are the specific equations that are being used in this problem?arrow_forwardThe Rydberg constant for a Hydrogen atom is R = 1.097 x 107 m-1. What is the ionisation energy of Hydrogen? Select one: a. 13.6 eV b. 7.8 eV c. 5.7 eV d. 10.6 eVarrow_forward
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