The radius of the first Bohr orbit in for a μmesic (or muonic) atom is ( The masses of μ^{– }meson and proton are 207 times and 1836 times respectively the mass of electron).
The moment of inertia of the HCl molecule is 2.71 x 10^{47} kgm^{2}. The most populated rotational level for the molecule at temperature of 600 K corresponds to
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The magnetic moment of an election moving in a circular orbit of radius r about a proton is
where =
The normal Zeeman splitting in the mercury 4916 Å line in a magnetic field of 0.3 T is
The common wave number difference in the two successive rotational lines is
For high principal quantum number (n) for hydrogen atom the spacing between the neighbouring energy level is proportional to
The Lande gfactor for the ^{3}P_{2} level of an atom is______________
(Round off to one decimal places)
The Bohr model gives the value for the ionization potential of Be^{+++} ion as__________10^{1} eV
(Round off to two decimal places)
The line width of a spectral line of 600 mil wavelength emitted from a level of a lifetime of 10^{8 }sec, is__________×10^{15} m (up to two decimal places)
The radiations given offby the Hg atoms returning to their normal states were studied by Frank and Heitz and
a line was observed at 2573 Å. The excitation potential for Hg is________volt (upto one decimal place)
The spacing of a series of lines in the microwave spectrum of AIH is constant at 12.604 cm^{1}. The moment of
inertia of the AIH molecule is_______x 10^{47} kg/m^{2}. (upto two decimal places)
If the K_{α }radiation o f Mo (Z = 42) lias a wavelength o f 0.71 A. the wavelength o f the corresponding radiation for Cu (Z = 29) is Å. (upto two decimal places)
A positroniiun atom is system consisting of a position and an electron revolving about their common center of mass, which lies halfway between them. The ratio of the wavelength of the first line of the Balmer series of positroniumatomto the wavelength of the first line of the Balmer seiies of hydrogen atom is
A sample of ordinary hydrogen gas in a discharge tube was seen to emit the usual Balmer spectrum. On careful examination however, it was found that the H_{α} line in the spectrum was split into two fine lines, one an intense line at 6562.80 Å and the other at 6561.01 Å. From this, one can conclude that the gas sample had a small impurity of
The gBe^{+} ion has a nucleus with spin The possible values of the hypofine quantum number F for the ^{2}S_{1/2 }electric level are
An atomic magnetic dipole having orbital magnetic moment of 1 Bohr magneton is aligned parallel to a external magnetic field of 1 Tesla. The energy required to turn the dipole to align it antiparallel to the field is_________x 10^{4} eV. (upto two decimal places)
In the doublet splitting of the first excited state. 2^{2}P_{3/2} — 2 ^{2}P_{1/2} of He^{+} is 5.84 cm^{1}. the corresponding separation for H is
Assume that the H_{2} molecule behaves like a harmonic oscillator with a force constant k = 573 N/m the vibrational quantum number, corresponding to its dissociation energy 4.5 eV, is
If the exciting line in an experiment is 5460 Å and the stokes line is at 5520 Å. the wavelength (inÅ) of the antistokes line is__________Å. (should be an integer)
1 docs34 tests

1 docs34 tests
