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What is value (magnitude) of electric fi...

What is value (magnitude) of electric field required for field emission?

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KUMAR PRAKASHAN-DUAL NATURE OF RADIATION AND MATTER-Section-A Try yourself
  1. Define an electron Volt and show it in Joule unit.

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  2. 1 J is equal to how many electron volt?

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  3. What is value (magnitude) of electric field required for field emissio...

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  4. What is photoelectron?

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  5. What did Hertz observe in experiment to produce electomagnetic waves?

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  6. In Lenard's experiment what is effect on current when ultraviolet radi...

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  7. Define threshold frequency.

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  8. Value of threshold frequency depend on which factors?

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  9. For most metals threshold frequencies lie in which region?

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  10. For alkali metals threshold frequencies lie in which region?

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  11. How frequency of incident radiation is changed in experiment of photoe...

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  12. How intensity of incident radiation is changed in experiment of photoe...

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  13. No. of photoelectrons emitted varies with which physical quantity?

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  14. What is saturation current?

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  15. What is stopping potential?

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  16. What is cut-off potential ?

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  17. Energy of photoelectron depends on which factors?

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  18. What phenomena of light can be explained on the basis of wave theory o...

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  19. Why wave theory can not explain change in energy of electron with chan...

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  20. "with increase in frequency of light incident number of electrons emit...

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