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 "

Try The Short Questions For 12th Class Physics Chapter 8 Short Questions Preparation

  • Total Questions10

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Physics - 12th Class Physics Chapter 8 Short Questions Preparation

Question # 1

When does light behaves as a wave?When does light behaves as a particle?

  • Ans 1: Light behave as a wave when it propagates from one place to other and light behave as a particle when it interacts with matter,Light behaves as a wave in interference and diffraction,Light behaves as a particle in photoelectric and Compton effect.
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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

When does light behaves as a wave?When does light behaves as a particle?

  • Ans 1: Light behave as a wave when it propagates from one place to other and light behave as a particle when it interacts with matter,Light behaves as a wave in interference and diffraction,Light behaves as a particle in photoelectric and Compton effect.
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12th Class Physics Chapter 8 Short Questions Preparation - Set 2

Question # 1

Give two postulate of special theory of relativity.

  • Ans 1: Postulate of special theory of relativity are states as
    1. The laws of physics are the same in all inertial frames.
    2. The speed of light in free space has the same value for all observes,regardless of their state of motion.
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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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19th Chapter

12th Class Physics Ch 19 Preparation

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