Home
Class 11
PHYSICS
In a standing wave formed by two atoms s...

In a standing wave formed by two atoms separated by 1.21Å,` there are 3 nodes and 2 antinodes. Find its wavelength.

A

`1.21 Å`

B

`2.42Å`

C

`6.05Å`

D

`3.63Å`

Text Solution

Verified by Experts

The correct Answer is:
A


Here n= no.of closed loops = no. of antinodes =2
Now, `lamda _(n) = (2L)/(n) = ( 2 xx 1.21 )/(2) 1.21 Å`
Promotional Banner

Topper's Solved these Questions

  • WAVES

    KUMAR PRAKASHAN|Exercise SECTION-E (Multiple Choice Questions (MCQs)) (MCQs asked in Gujarat Board and Competitive Exams)|54 Videos
  • UNITS AND MEASUREMENT

    KUMAR PRAKASHAN|Exercise Section -F (Questions from Module )|20 Videos
  • WORK, ENERGY AND POWER

    KUMAR PRAKASHAN|Exercise QUESTION PAPER (SECTION - D)|1 Videos

Similar Questions

Explore conceptually related problems

Equation of a wave propagating on a string is y =3 cos {pi (100 t - x)} (Where x is in cm and t is in s). Find its wavelength.

A standing wave having 3 nodes and 2 antinodes is formed between two atoms having a distance 1.21Å between them. The wavelength of the standing wave is

Assume that the de-Brogile wave associated with an electron can form a standing wave between the atoms arranged in a one dimensional array with nodes at wach of the atomic sites. If is found that one such standing wave is formed if the distance 'd' between the atoms of the array is 2Å . A similar wave in again formed if 'd' is increased to 2.5 A but not for any intermediate value of d. Find the energy of the electrons in electron volts and the least value of d for which the standing wave of the standing wave of the type described above can form.

In one stationary wave if distance between consecutive node and antinode is 5 cm then find distance between two consecutive antinodes.

The displacement of the medium in a sound wave is given by the equation y_(1) = A cos(ax + bt) where A , a and b are positive constants. The wave is reflected by an obstacle situated at x = 0 . The intensity of the reflected wave is 0.64 times that of the incident wave. (a) What are the wavelength and frequency of incident wave? (b) Write the equation for the reflected wave. ( c ) In the resultant wave formed after reflection, find the maximum and minimum values of the particle speeds in the medium. (d) Express the resultant wave as a superposition of a standing wave and a travelling wave. What are the positions of the antinodes of the standing wave ? What is the direction of propagation of travelling wave?

Along the direction of propagation of one wave of frequency 120 Hz, phase difference between two particles separated by 1 m distance is 90^(@) . Find velocity of this wave.

A standing wave of time period T is set up in a string clamped between two rigid supports, At t =0 antinode is at its maximum displacement 2A .

Statement-1 : In the case of a stationary wave, a person hear a loud sound at the nodes as compared to the antinodes Statement-2 : In a stationary wave all the particles of the medium vibrate in phase.

A metallic rod of length 1m is rigidly clamped at its mid point. Longirudinal stationary wave are setup in the rod in such a way that there are two nodes on either side of the midpoint. The amplitude of an antinode is 2 xx 10^(-6) m . Write the equation of motion of a point 2 cm from the midpoint and those of the constituent waves in the rod, (Young,s modulus of the material of the rod = 2 xx 10^(11) Nm^(-2) , density = 8000 kg-m^(-3) ). Both ends are free.

KUMAR PRAKASHAN-WAVES-SECTION-F (Questions From Module) (Sample questions for preparation of competitive exams)
  1. In a standing wave formed by two atoms separated by 1.21Å, there are 3...

    Text Solution

    |

  2. Relation between phase difference (Delta phi) and path difference (Del...

    Text Solution

    |

  3. Give distance between consecutive nodes and antinodes in terms of wave...

    Text Solution

    |

  4. Velocity of a wave y = 10 ^(-4) sin (100 t - (x)/(10)) m is …...m/s

    Text Solution

    |

  5. Find wave speed in a string of length 7m, mass 0.035 kg and having a t...

    Text Solution

    |

  6. A source whistling a sound of frequency 450 Hz moves towards a station...

    Text Solution

    |

  7. For a stationary wave y = 10 sin ((pi x )/(4)) cos (2pi t ) metre, di...

    Text Solution

    |

  8. For a progressive wave y = Asin(kx-wt), ratio of maximum velocity of a...

    Text Solution

    |

  9. Velocity of sound in O(2) gas is 460 ms^(-1) at certain temperature. ...

    Text Solution

    |

  10. One car while moving towards a cliff, blows a horn with frequency f. I...

    Text Solution

    |

  11. Phase difference between two waves y (1) = A sin (omega t - kx) and y ...

    Text Solution

    |

  12. When a wave passes through a given medium, which of following quantiti...

    Text Solution

    |

  13. Two waves with wavelength lamda have phase difference of 60° at the po...

    Text Solution

    |

  14. One rod vibrates with frequency 200 Hz. It produces a sound which trav...

    Text Solution

    |

  15. When some vehicle moves towards a stationary person, he finds differen...

    Text Solution

    |

  16. When two waves of amplitudes 3 unit and 5 unit superpose at some point...

    Text Solution

    |

  17. During earthquake at one place transverse wave (S) and longitudinal wa...

    Text Solution

    |

  18. If temperature of weather changes then ..... will be affected for soun...

    Text Solution

    |

  19. For one closed pipe and one open pipe, frequencies of their first harm...

    Text Solution

    |

  20. One person moves towards a stationary source of sound with a speed (1)...

    Text Solution

    |