ICS Part 2 Physics Chapter 20 Short Questions Preparation


12th Class Physics
Short Questions Preparation

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Online Short Questions For Chapter 9 "ICS Part 2 Physics Chapter 20 Short Questions Preparation "

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Physics - ICS Part 2 Physics Chapter 20 Short Questions Preparation

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.
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Prepare Complete Set Wise Questions For Chapter 9 "ICS Part 2 Physics Chapter 20 Short Questions Preparation "

ICS Part 2 Physics Chapter 20 Short Questions Preparation - Set 1

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.
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ICS Part 2 Physics Chapter 20 Short Questions Preparation - Set 2

Question # 1

Write two properties of x-rays.

  • Ans 1:
    1. They cause ionization.
    2. They have very short wavelength.
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ICS Part 2 Physics Chapter 20 Short Questions Preparation - Set 3

Question # 1

What are the difference between laser light and ordinary light?

  • 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.
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ICS Part 2 Physics Chapter 20 Short Questions Preparation

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