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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
Explain why laser action could not occur without population inversion between atomic levels?
- Ans 1: When a large percentage of atom or sample are in population inversion,then large number of coherent photons along same direction of motion could be obtained to form laser light,It is impossible withput population inversion.
ICS Part 2 Physics Chapter 20 Short Questions Preparation - Set 1
Question # 1
Explain why laser action could not occur without population inversion between atomic levels?
- Ans 1: When a large percentage of atom or sample are in population inversion,then large number of coherent photons along same direction of motion could be obtained to form laser light,It is impossible withput population inversion.
ICS Part 2 Physics Chapter 20 Short Questions Preparation - Set 2
Question # 1
Differentiate between Line and Band spectrum.
- Ans 1: Line spectrum: When electron jumps from higher orbit to lower orbit ,it emits energy,This emission of energy constitutes spectral line,This is called the line spectrum.
- Ans 2: Band spectrum:is produced by molecules,They are the groups of lines which are closely spaced to another.
ICS Part 2 Physics Chapter 20 Short Questions Preparation - Set 3
Question # 1
Write two properties of x-rays.
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Ans 1:
- They cause ionization.
- They have very short wavelength.
