Atomic And Molecular Physics - Study Mode
[#61] A collection of N atoms is exposed to a strong resonant electromagnetic radiation with N g atoms in the ground state and N atoms in the excited state, such that N g + N e = N. This collection of two-level atoms will have the following population distribution
Correct Answer
(C) N g ≈ N e ≈ N/2
[#62] The last two terms of the electronic configuration of manganese (Mn) atom is 3d 5 4s 2 . The term factor of Mn 4+ ion is
Correct Answer
(B) 4 f 3/2
[#63] Deuteron in its ground state has a total angular momentum J = 1 and a positive parity. The corresponding orbital angular momentum L and spin angular momentum S combinations are
Correct Answer
(C) L = 0, S = 1 and L = 2, S = 1
[#64] Two monochromatic waves having frequencies $$omega $$ and $$omega + Delta omega left( {Delta omega ll omega }
ight)$$ xa0 xa0and corresponding wavelengths $$lambda $$ and $$lambda - Delta lambda left( {Delta lambda ll lambda }
ight)$$ xa0 xa0of same polarization, travelling along X-axis are superimposed on each other. The phase velocity and group velocity of the resultant wave are respectively given by
Correct Answer
(A) $$frac{{omega lambda }}{{2pi }},,frac{{Delta omega {lambda ^2}}}{{2pi Delta lambda }}$$
[#65] A pure rotational Raman spectrum of a linear diatomic molecule is recorded using electromagnetic radiation of frequency $${
u _e}$$ . The frequency of two consecutive Stokes lines are
Correct Answer
(A) $${
u _e}$$ - 10B, $${
u _e}$$ - 14B