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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
What is meant by line spectrum? How line spectrum can be used for the identification of elements?
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Ans 1: When an electron jumps from higher energy state to lower energy state than emits energy and make a spectral line.E2- E1=hfThis is called line spectrum.And different elements emit line spectrum of different wavelengths,So they can be identifiedeasily.
ICS Part 2 Physics Chapter 20 Short Questions Preparation - Set 1
Question # 1
What is meant by line spectrum? How line spectrum can be used for the identification of elements?
-
Ans 1: When an electron jumps from higher energy state to lower energy state than emits energy and make a spectral line.E2- E1=hfThis is called line spectrum.And different elements emit line spectrum of different wavelengths,So they can be identifiedeasily.
ICS Part 2 Physics Chapter 20 Short Questions Preparation - Set 2
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.
ICS Part 2 Physics Chapter 20 Short Questions Preparation - Set 3
Question # 1
What is CAT scanner?
- Ans 1: A vastly improved x-rays technique is computerized axial tomography: the corresponding instrument is called CAT scanner.In CAT scanning a number of different orientations.Computer is attached to construct picture,Density difference of the order of one percent can be detected,Tumors and other anomalies much too small to be seen with older techniques can be detected.
