Fsc part 2 online preparation for physics chapter 19 (modern physics)

Online Short Questions For Chapter 8 "12th Class Physics Chapter 8 Short Questions Preparation "

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Physics - 12th Class Physics Chapter 8 Short Questions Preparation

Question # 1

Define pair production and annihilation of matter.

  • Ans 1: Pair production:The change of very high energy photon into an electron,positron pair is called pair production.
    Annihilation of matter:When a positron comes close to an electron,they annihilation and produce two photons in the gamma rays range.It is called annihilation of matter.
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Prepare Complete Set Wise Questions For Chapter 8 "12th Class Physics Chapter 8 Short Questions Preparation "

12th Class Physics Chapter 8 Short Questions Preparation - Set 1

Question # 1

Define pair production and annihilation of matter.

  • Ans 1: Pair production:The change of very high energy photon into an electron,positron pair is called pair production.
    Annihilation of matter:When a positron comes close to an electron,they annihilation and produce two photons in the gamma rays range.It is called annihilation of matter.
Submit

12th Class Physics Chapter 8 Short Questions Preparation - Set 2

Question # 1

Define pair production and annihilation of matter.

  • Ans 1: Pair production:The change of very high energy photon into an electron,positron pair is called pair production.
    Annihilation of matter:When a positron comes close to an electron,they annihilation and produce two photons in the gamma rays range.It is called annihilation of matter.
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12th Class Physics Chapter 8 Short Questions Preparation - Set 3

Question # 1

What are black body radiations and how can you get a black body?

  • Ans 1: An objects that absorbs all radiations falling on it,at all wavelength is called a black body.
    When a body is heated ,it emits radiation its emission is called black body.
    Black body is solid that has hollow cavity within it and a small hole through which radiations can enter or escape.The inside is blackened with suit to make it as good an absorber and as a bad reflector as possible.
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12th Class Physics Ch 19 Preparation

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