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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
In which region of electromagnetic spectrum does the following series fall (a)Lyman series (b)Balmer series?
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Ans 1: Balmer series falls in the visible region.Lyman series falls in the ultraviolet region.
ICS Part 2 Physics Chapter 20 Short Questions Preparation - Set 1
Question # 1
In which region of electromagnetic spectrum does the following series fall (a)Lyman series (b)Balmer series?
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Ans 1: Balmer series falls in the visible region.Lyman series falls in the ultraviolet region.
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
What is meant by lasing action?
- Ans 1: When a large percentage of atom or sample is in population inversion then large number of coherent photons along same direction of motion could be obtained to form laster light,The combination of spontaneous emission of first and then stimulated emission cause the laser to generate coherent beam of light at a single frequency which is called lasing action.
