Home
Class 12
PHYSICS
A fast moving bullet is not diffracted b...

A fast moving bullet is not diffracted by a crystal surface, while an electron diffracts. Why?

Text Solution

Verified by Experts

The wavelength of bullet is of the order of `10^(-31)` m while that of an electron is `10^(-10)` m. Diffraction is possible when the width of aperture is of the order of the same order as that of wave. Inter atomic distance of crystal is `10^(-10)`m. Hence only electrons get diffracted.
Promotional Banner

Topper's Solved these Questions

  • DUAL NATURE OF RADIATION AND MATTER

    NEW JOYTHI PUBLICATION|Exercise CONTINUOUS EVALUATION (ASSIGNMENT)|4 Videos

  • DUAL NATURE OF RADIATION AND MATTER

    NEW JOYTHI PUBLICATION|Exercise PREVIOUS YEAR QUESTIONS|4 Videos

  • DUAL NATURE OF RADIATION AND MATTER

    NEW JOYTHI PUBLICATION|Exercise PRACTICE PROBLEMS FOR SELF ASSESSMENT|5 Videos

  • CURRENT ELECTRICITY

    NEW JOYTHI PUBLICATION|Exercise COMPETITIVE EXAM CORNER|37 Videos

  • ELECTRIC CHARGES AND FIELDS

    NEW JOYTHI PUBLICATION|Exercise Competitive Exam Corner|20 Videos

Similar Questions

Explore conceptually related problems

Diffraction angle 2 theta equal to 14.8 ^(@) for a crystal having interplanar distance in the crystal is 0.400 nm when second order diffraction was observed. Calculate the wavelength of X-ray used.

Radio waves diffract around the building, while light waves eventhough electromagnetic do not. Why ?

A parallel beam of fast moving electron is incident normally on a narrow slit . A fluorescent screen is placed at a large distance from the slit . If the speed of the electrons is correct?

A bat is flitting about in a cave, navigating via ultrasonic beeps. Assume that the sound emission frequency of the bat is 40kHz. During one fast swoop directly toward a flat wall surface, the bat is moving at 0.03 times the speed of sound in air. What frequency does the bat hear reflected off the wall?

Two large conducting spheres carrying charges Q_1, and Q_2, are brought close to each other. Is the magnitude of electrostatic force between theme exactly given by (Q_1Q_2)/(4pi epsi_(0) r^(2)) , where r is the distance between their centres? b. If Coulomb's law involved 1/r^(3) dependence ("instead of "1/r^2), would Gauss law be still true? c. A small test charge is released at rest at a point in an electrostatic field configuration. Will it travel along the field line passing through that point? d. What is the work done by the field of a nucleus in a complete circular orbit of the electron? What if the orbit is elliptical? e. We know that electric field is discontinuous across the surface of a charged conductor. Is electric potential also discontinuous there? f. What meaning would you give to the capacitance of a single conductor? g. Guess a possible reason why water has a much greater dielectric constant (=80) than say, mica (= 6).

A closed surface S is constructed around a conducting wire connected to a battery and a switch (figure 30-Q6). As the switch is closed, the free electrons in the wire start moving along the wire. In any time interval, the number of electrons entering the closed surface S is equal to the number of electrons leaving it. On closing the switch, the flux of the electric field through the closed surface

If a fly collides with the windshield of a fast-moving bus, (a) Is the impact force experienced, same for the fly and the bus? Why (b) It is same acceleration experience by thte fly and the bus? Why?

NEW JOYTHI PUBLICATION-DUAL NATURE OF RADIATION AND MATTER -EVALUATION QUESTIONS AND ANSWERS
  1. a. The wave nature of matter is not noticeable in our daily observati...

    Text Solution

    |

  2. What do the graphs represent?

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

  6. Define 1 eV.

    Text Solution

    |

  7. What are the factors on which the rate of thermionic emission depends?

    Text Solution

    |

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

    Text Solution

    |

  9. Give examples for metals sensitive to UV rays and then for visible lig...

    Text Solution

    |

  10. Why is photocurrent proportional to intensity?

    Text Solution

    |

  11. What is saturation current?

    Text Solution

    |

  12. How does a fire alarm work?

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

  16. Why wooden surface does not exhibit photoelectric effect?

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

  20. If a proton and electron have the same de-Broglie wavelength, then

    Text Solution

    |