Atomic and Molecular Physics [GATE (Graduate Aptitude Test in Engineering) Physics (PE)]: Questions 35 - 39 of 109
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Question 35
Appeared in Year: 2011
Question MCQ▾
The far infrared rotational absorption spectrum of a diatomic molecule shows equidistance lines with spacing . The position of the first Stokes line in the rotational Raman spectrum of this molecule is –
Choices
Choice (4) | Response | |
---|---|---|
a. | ||
b. | ||
c. | ||
d. |
Question 36
Appeared in Year: 2010
Question MCQ▾
Two states of an atom have definite parities. An electric dipole transition between these states is
Choices
Choice (4) | Response | |
---|---|---|
a. | Allowed if both the states have even parity | |
b. | Allowed if both the states have odd parity | |
c. | Not allowed unless a static electric field is applied | |
d. | Allowed if the two states have opposite parities |
Question 37
Appeared in Year: 2010
Question MCQ▾
To detect trace amount of a gaseous species in a mixture of gases, the preferred probing tools is –
Choices
Choice (4) | Response | |
---|---|---|
a. | ESR spectroscopy | |
b. | Laser spectroscopy | |
c. | NMR spectroscopy | |
d. | Ionization spectroscopy with – rays |
Question 38
Appeared in Year: 2010
Question MCQ▾
The first three energy levels of are shown below
The expected spin – parity and energy of the next level are given by –
Choices
Choice (4) | Response | |
---|---|---|
a. | ||
b. | ||
c. | ||
d. |
Question 39
Appeared in Year: 2010
Question Match List-Ⅰ List-Ⅱ▾
Match the typical spectra of stable molecules with the corresponding wave number range –
List-Ⅰ (Group I) | List-Ⅱ (Group II) |
---|---|
(A) Electronic spectra | (i) and above |
(B) Molecular spectra | (ii) |
(C) Rotational spectra | (iii) |
Choices
Choice (4) | Response | |
---|---|---|
| ||
a. |
| |
b. |
| |
c. |
| |
d. | All of the above |