Home
Class 12
PHYSICS
For the diffraction from a crystal with ...

For the diffraction from a crystal with `lamda=1Å` and Bragg's angle `theta=60^(@)`, then for the second order diffraction 'd' will be :

A

1.15 Å

B

0.75 Å

C

0.55 Å

D

2.1 Å

Text Solution

Verified by Experts

The correct Answer is:
A

`nlamda=2dsintheta ," "theta=60^(@),n=2`
`d=(2xx1xx2xx10^(-10))/(2xxsqrt3)=1.15Å`
Promotional Banner

Topper's Solved these Questions

  • NEET

    NEET PREVIOUS YEAR (YEARWISE + CHAPTERWISE)|Exercise PHYSICS|157 Videos
  • NEET

    NEET PREVIOUS YEAR (YEARWISE + CHAPTERWISE)|Exercise QUESTION|95 Videos
  • MOTION IN TWO AND THREE DIMENSION

    NEET PREVIOUS YEAR (YEARWISE + CHAPTERWISE)|Exercise All Questions|47 Videos
  • NEET 2020

    NEET PREVIOUS YEAR (YEARWISE + CHAPTERWISE)|Exercise All Questions|45 Videos

Similar Questions

Explore conceptually related problems

Light is incident normally on a diffraction grating through which the first order diffraction is seen at 32^@ . The second order diffraction will be seen at

Wave property of electron implies that they will show diffraction effected . Davisson and Germer demonstrated this by diffracting electron from crystals . The law governing the diffraction from a crystals is obtained by requiring that electron waves reflected from the planes of atoms in a crystal inter fere constructiely If a strong diffraction peak is observed when electrons are incident at an angle i from the normal to the crystal planes with distance d between them (see fig) de Brogle wavelength lambda_(dB) of electrons can be calculated by the relationship (n is an intenger)

A slit of width a is illuminiated by white light. The first diffraction minimum for light of lamda=6500 Å is formed at theta=30^(@) , then the width (a) of the slit is

Wave property of electron implies that they will show diffraction effected . Davisson and Germer demonstrated this by diffracting electron from crystals . The law governing the diffraction from a crystals is obtained by requiring that electron waves reflected from the planes of atoms in a crystal inter fere constructiely Electron accelerated by potential V are diffracted from a crystal if d = 1 Å and i = 30^(@), V should be about (h = 6.6 xx 10^(-34) Js, m_(e) = 9.1 xx 10^(-31) kg , e = 1.6 xx 10^(-19)C)

Calculate lambda of X-rays which give a diffraction angle 2 theta = 16.8^(@) for crystal, if the interplanar distance in the crystal is 0.2 nm and that only for the first-order diffraction is observed. Given sin 8.40^(@) = 0.146 .

Wave property of electrons implies that they will show diffraction effects. Davission and Germer demonstrated this by diffracting electrons from crystals. The law governing the diffraction from a crystal is obtained by requiring that electron waves reflected from the planes of atoms in a crystal interfere constructively (see figure) The surface of a metal is illuminated with the light of 400 nm . The kinetic energy of the ejected photoelectrons was found to be 1.68 eV . The work function of the metal is : ( hc = 1240 eV-nm )

NEET PREVIOUS YEAR (YEARWISE + CHAPTERWISE)-NEET-MCQ
  1. For the diffraction from a crystal with lamda=1Å and Bragg's angle the...

    Text Solution

    |

  2. The damping force on an oscillator is directly proportional to the vel...

    Text Solution

    |

  3. The motion of a particle along a straight line is described by equatio...

    Text Solution

    |

  4. The horizontal range and the maximum height of a projectile are equal....

    Text Solution

    |

  5. A particle has initial velocity (2 vec(i)+3 vec(j)) and acceleration (...

    Text Solution

    |

  6. A car of mass 1000kg negotiates a banked curve of radius 90m on a fict...

    Text Solution

    |

  7. A solid cylinder of mass 3 kg is rolling on a horizontal surface with ...

    Text Solution

    |

  8. The potential energy of a particle in a force field is: U = (A)/(r^(...

    Text Solution

    |

  9. Two sphere A and B of masses m(1) and m(2) respectivelly colides. A is...

    Text Solution

    |

  10. Two persons of masses 55 kg and 65 kg respectively are at the opposite...

    Text Solution

    |

  11. ABC is an equilateral triangle with O as its centre vec(F(1)),vec(F(2)...

    Text Solution

    |

  12. When a mass is rotating in a plane about a fixed point, its angular mo...

    Text Solution

    |

  13. A spherical planet far out in space has a mass M(0) and diameter D(0)....

    Text Solution

    |

  14. A geostationary satellite is orbiting the earth at a height of 5R abov...

    Text Solution

    |

  15. The height a which the weight of a body becomes 1//16th its weight on ...

    Text Solution

    |

  16. Two sources of sound placed close to each other are wmitting progressi...

    Text Solution

    |

  17. When a string is divided into three segments of length l1,l2 and l3 th...

    Text Solution

    |

  18. One mole of an ideal gas goes from an initial state A to final state B...

    Text Solution

    |

  19. A thermodynamics system is taken trough the cycle ABCD as shown in fig...

    Text Solution

    |

  20. Liquid oxygen at 50 K is heated to 300 K at constant pressure of 1 atm...

    Text Solution

    |

  21. If the radius of a star is R and it acts as a black body, what would b...

    Text Solution

    |