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Eventhough metals have free electrons, ...

Eventhough metals have free electrons, they cannot escape from metal surface. Why?

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If an electron tends to escape from metal surface, the atom which is losing the electron becomes a positive ion and pulls back the electron to itself. Hence free electrons of metals cannot escape from the surface.
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NEW JOYTHI PUBLICATION-DUAL NATURE OF RADIATION AND MATTER -EVALUATION QUESTIONS AND ANSWERS
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  2. What do the graphs represent?

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  3. Which of the following statements are is not correct about a photon?

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  4. a. Every metal has a definite work function. Why all photoelectrons ...

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  5. Eventhough metals have free electrons, they cannot escape from metal ...

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  8. Does photoelectric effect violate the law of conservation of energy?

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  10. Why is photocurrent proportional to intensity?

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  11. What is saturation current?

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  12. How does a fire alarm work?

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  13. Does wave theory give proper explanation for photoelectric effect?

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  14. Why is light not deflected by electric and magnetic fields?

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  15. Why are alkali metal most suited for photoelectric emission?

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  16. Why wooden surface does not exhibit photoelectric effect?

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  17. A fast moving bullet is not diffracted by a crystal surface, while an ...

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  18. An electron and a proton have same speed. How are their wavelength rel...

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  19. Millikan verified Einstein's photoelectric equation. How?

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