51. Match the typical spectra of stable molecules with the corresponding wave number range
P. Electronic spectra
1. 106 cm-1 and above
Q. Rotational spectra
2. 105 - 106 cm-1
R. Molecular dissociation
3. 100 - 102 cm-1
P. Electronic spectra | 1. 106 cm-1 and above |
Q. Rotational spectra | 2. 105 - 106 cm-1 |
R. Molecular dissociation | 3. 100 - 102 cm-1 |
52. The molecular spectra of two linear molecules O-C-O and O-C-S are recorded in the microwave region. Which one of the following statements is correct?
53. If the equation of state for a gas with internal energy U is pV = $$\frac{1}{3}$$U, then the equation for an adiabatic process is
54. The Lβ line of X-rays emitted from an atom with principal quantum numbers n = 1, 2, 3, . . . . . . . ., arises from the transition
55. Five energy levels of a system including the ground state are shown below. Their lifetimes and the allowed electric dipole transitions are also marked.
Which one of the following transitions is the most suitable for a Continuous Wave (CW) laser?
Which one of the following transitions is the most suitable for a Continuous Wave (CW) laser?
56. When the refractive index $$\mu $$ of the active medium changes by $${\Delta \mu }$$ in a laser resonator of length L, the change in the spectral spacing between the longitudinal modes of the laser is (c is the speed of light in free space)
57. The allowed states for He (2p2) configuration are
58. For an electron in hydrogen atom, the states are characterized by the usual quantum numbers n, $$l$$, m$$l$$. The electric dipole transition between any two states requires that
59. Match the following:
P. Franck-Hertz experiment
1. Electronic excitation of molecules
Q. Hartree-Fock method
2. Wave function of atoms
R. Stern-Gerlach experiment
3. Spin angular momentum of atoms
S. Franck-Condon principle
4. Energy levels in atoms
P. Franck-Hertz experiment | 1. Electronic excitation of molecules |
Q. Hartree-Fock method | 2. Wave function of atoms |
R. Stern-Gerlach experiment | 3. Spin angular momentum of atoms |
S. Franck-Condon principle | 4. Energy levels in atoms |