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12th Class Physics
Short Questions Preparation
Start Chapter 20 Preparation
12th Class Physics Chapter Wise Preparation
Online Short Questions For Chapter 9 "ICS Part 2 Physics Chapter 20 Short Questions Preparation "
Try The Short Questions For ICS Part 2 Physics Chapter 20 Short Questions Preparation
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Total Questions10
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Available Sets3
Physics - ICS Part 2 Physics Chapter 20 Short Questions Preparation
Question # 1
Explain why laser action could not occur without population inversion between atomic levels?
- Ans 1: When a large percentage of atom or sample are in population inversion,then large number of coherent photons along same direction of motion could be obtained to form laser light,It is impossible withput population inversion.
ICS Part 2 Physics Chapter 20 Short Questions Preparation - Set 1
Question # 1
Explain why laser action could not occur without population inversion between atomic levels?
- Ans 1: When a large percentage of atom or sample are in population inversion,then large number of coherent photons along same direction of motion could be obtained to form laser light,It is impossible withput population inversion.
ICS Part 2 Physics Chapter 20 Short Questions Preparation - Set 2
Question # 1
Define normal population and population inversion.
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Ans 1: In normal population ,the lower energy state has a greater population than the higher energy state.Population inversion occurs when no more electron are in a higher energy state than in lower energy state.
ICS Part 2 Physics Chapter 20 Short Questions Preparation - Set 3
Question # 1
List of color of line spectra of an excited hydrogen atom.
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Ans 1: The color of line spectrum of hydrogen atom are
- Red
- Blue
- Blue-Green
- Violet
- Ultraviolet
