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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
How does a Kax-rays differ KbX-rays?
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Ans 1: When an electron from L -shell jumps to occupy the hole in K- shell Kax-rays is emitted .AndWhen an electron from M -shells jumps to occupy the hole in K-Shell KbX-rays is emited.
ICS Part 2 Physics Chapter 20 Short Questions Preparation - Set 1
Question # 1
How does a Kax-rays differ KbX-rays?
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Ans 1: When an electron from L -shell jumps to occupy the hole in K- shell Kax-rays is emitted .AndWhen an electron from M -shells jumps to occupy the hole in K-Shell KbX-rays is emited.
ICS Part 2 Physics Chapter 20 Short Questions Preparation - Set 2
Question # 1
Can x-rays be reflected,diffracted polarized just like any other eaves?Explain
- Ans 1: Yes x rays can be reflected,refracted diffracted by crystal only and polarized just like any other waves.
ICS Part 2 Physics Chapter 20 Short Questions Preparation - Set 3
Question # 1
Distinguished between stimulated emission and spontaneous emission.
- Ans 1: Stimulated emission: If a atom is excited for a longer lifetime of about 10-3sec than an incident photon of energy equal to the difference of two energy levels induces the atom to decay by emitting a photon that travel in the direction of incident photon.This process is called stimulated or induced emission.
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Ans 2: Spontaneous Emission: As excited is highly unstable with life time of10-8sec,so electron will de excite itself with emission of a photon in any arbitrarydirection is called spontaneous emission.
