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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
Write down use of laser in industry.
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Ans 1: It can be used for telecommunication in fibre optics.It is used to read bar codes,It is used to generate 3D image of objects by holography.
ICS Part 2 Physics Chapter 20 Short Questions Preparation - Set 1
Question # 1
Write down use of laser in industry.
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Ans 1: It can be used for telecommunication in fibre optics.It is used to read bar codes,It is used to generate 3D image of objects by holography.
ICS Part 2 Physics Chapter 20 Short Questions Preparation - Set 2
Question # 1
What are the difference between laser light and ordinary light?
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Ans 1: The laser light is intense ,unidirectional and phase coherent ,so it does bit spread as compared to ordinary light.The energy of laser can be focused at a point to get enough heat for welding which is not possible with ordinary light.A laser beam is used as a surgical tool for welding detached retina which ordinary light can not do.
ICS Part 2 Physics Chapter 20 Short Questions Preparation - Set 3
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.
