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

Define normal population and population inversion.

  • 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.
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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

Define normal population and population inversion.

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

Question # 1

Write two postulate of Bohr's model of H-atom.

  • Ans 1:
    • An electron ,bound to the nucleus in an atom,can moved around the nucleus in certain circular orbits without radiating,These orbits are called the discrete stationary orbits.
    • Only those stationary orbits are allowed for which orbital angular momentum is equal to an integral multiple mvr=nh/2π.
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ICS Part 2 Physics Chapter 20 Short Questions Preparation - Set 3

Question # 1

Briefly describe continuous x-rays.

  • Ans 1: Continuous X-rays is due to an effect known as Bremsstrahlung effect when fast moving electron bombarded at the target,they are suddenly slowed down on impact with the target,And due to deceleration their kinetic energy is converted into X-rays photons.
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20th Chapter

ICS Part 2 Physics Chapter 20 Short Questions Preparation

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