Atomic & Molecular Physics-Population Inversion (CSIR (Council of Scientific & Industrial Research) Physical Sciences): Questions 1 - 2 of 2

Access detailed explanations (illustrated with images and videos) to 464 questions. Access all new questions we will add tracking exam-pattern and syllabus changes. Unlimited Access for Unlimited Time!

View Sample Explanation or View Features.

Rs. 300.00 or

How to register?

Question number: 1

» Atomic & Molecular Physics » Population Inversion

Edit

Appeared in Year: 2012

MCQ▾

Question

Consider the energy level diagram shown below, which corresponds to the molecular nitrogen laser.

The energy level diagram

The Energy Level Diagram

If the pimp rate R is and the decay routes are as shown with and , the equilibrium populations of states 2 and 1 are respectively. (December)

Choices

Choice (4)Response

a.

b.

c.

d.

Passage

Chromium ions cubic centimeter. All the atoms excited by the radiation decay rapidly to level which has a lifetime

Three energy levels for Chromium ions

Three Energy Levels for Chromium Ions

(June)

Question number: 2 (1 of 1 Based on Passage) Show Passage

» Atomic & Molecular Physics » Population Inversion

Edit

Appeared in Year: 2011

MCQ▾

Question

Assuming that there is no radiation of wavelength present in the pumping cycle and that the pumping rate is R atoms per , the population density in the level builds up as:

Choices

Choice (4)Response

a.

b.

c.

d.

Developed by: