Atomic & Molecular Physics-Optical Pumping (CSIR Physical Sciences): Questions 1 - 1 of 1

Get 1 year subscription: Access detailed explanations (illustrated with images and videos) to 401 questions. Access all new questions we will add tracking exam-pattern and syllabus changes. View Sample Explanation or View Features.

Rs. 300.00 or

Passage

1.6×1019 Chromium ions cubic centimeter. All the atoms excited by the 0.4μm radiation decay rapidly to level E2 which has a lifetime τ=3ms

Three energy levels for Chromium ions

Three Energy Levels for Chromium Ions

In figure three distinct energy levels are shown. All atoms excited by radiation decay.

(June)

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

» Atomic & Molecular Physics » Optical Pumping

Appeared in Year: 2011

MCQ▾

Question

The minimum pump power required (per cubic centimeter) to bring the system to transparency, i. e. , zero gain, is –

Choices

Choice (4) Response

a.

2.64kW

b.

1.52kW

c.

0.76kW

d.

1.32kW

f Page
Sign In