Home
Class 12
PHYSICS
Two coherent monochromatic light beams o...

Two coherent monochromatic light beams of intensities I and 41 are superposed. The maximum and minimum possible intensities in the resulting beam are

A

5I and I

B

9I and I

C

5I and 3I

D

9I and 3I

Text Solution

Verified by Experts

The correct Answer is:
A, D
`I_(max)=(sqrt(I_(1))+sqrt(I_(2)))^(2)=(sqrt(4I)+sqrt(I))^(2)=9I`
`I_(max) = (sqrt(I_(1))-sqrt(I_(2)))^(2)=(sqrt(4I)-sqrt(I))^(2)=I`
Promotional Banner

Topper's Solved these Questions

  • OPTICS

    FULL MARKS|Exercise ADDITIONAL QUESITON - II ADDITIONAL PROBLEMS:|11 Videos

  • OPTICS

    FULL MARKS|Exercise TEXTUAL EVALUATION SOLVED V.NUMERICAL PROBLEMS|10 Videos

  • MAGNETISM AND MAGNETIC EFFECTS OF ELECTRIC CURRENT

    FULL MARKS|Exercise ADDITIONAL QUESTIONS SOLVED - NUMERICAL PROBLEMS :|4 Videos

  • RECENT DEVELOPMENTS IN PHYSICS

    FULL MARKS|Exercise ADDITIONAL QUESTIONS (Short Answer Question)|6 Videos

Similar Questions

Explore conceptually related problems

If the intensity ratio of two coherent sources used in Young's double slit experiemnt is 49:1 then the ratio between the maximum and minimum intensities in the interference pattern is

If the ratio of the amplitudes of two waves is 4 : 3 then the ratio of maximum and minimum intensities is ……….. .

Two coherent sources of different intensities send waves which interfere. The ratio of maximum intensity to the minimum intensity is 25. The intensities of the sources are in the ratio

Two forces are in the ratio of 3:4. The maximum and minimum of their resultants are in the ratio is

A small metal plate of work function phi is kept at a distance r from a singly ionised, fixed ion. A monochromatic light beam is incident on the metal plate and photoelectrons are emitted. Find maximum wavelength of the light beam so that some of that electrons may go round the ion along a circle.

Two light sources of equal amplitudes interfere with each other. Calculate the ratio of maximum and minimum intensities.

The width of one of the two slits in a Young's double slit experiment is double of the other slit. Assuming that the amplitude of the light coming from a slit is proportional to the slit width, find the ratio of the maximum to the minimum intensity in the interference pattern.

The ratio of intensities of two waves is 16 :9 . If they produce interference , then the ratio of maximum and minimum intensities will be ………….. .

FULL MARKS-OPTICS-ADDITIONAL QUESITON -( MULTIPLE CHOICE QUESTIONS )
  1. Magnification of a compound is 30. Focal length of eyepiece is 5 cm an...

    Text Solution

    |

  2. The astronomical microscope consists of objective and eyepiece. The fo...

    Text Solution

    |

  3. The number of lenses in terrestrial telescope is

    Text Solution

    |

  4. An achromatic combination of lenses is formed by joining

    Text Solution

    |

  5. Amount of light entering into the camera depends upon

    Text Solution

    |

  6. Myopia is corrected by using a

    Text Solution

    |

  7. The critical angle for total internal reflection in diamond is 24.5^(@...

    Text Solution

    |

  8. When a glass lens with mu = 1.47 is immersed in a troug of liquid, it ...

    Text Solution

    |

  9. In optical fibres, the refractive index of the core is

    Text Solution

    |

  10. For a wavelength of light lambda and scattering object of size 'a', al...

    Text Solution

    |

  11. Two coherent monochromatic light beams of intensities I and 41 are sup...

    Text Solution

    |

  12. In yound's double slit experiment, the separation between the slits is...

    Text Solution

    |

  13. In a young 's double slit experiment, 12 fringes are observed to be fo...

    Text Solution

    |

  14. Consider fraunhoffer diffraction pattern obtained with a single slit i...

    Text Solution

    |

  15. A beam of light of wavelenght 600 nm from a distant source falls on a ...

    Text Solution

    |

  16. A young's double slit experiment uses a monochromatic source. The shap...

    Text Solution

    |

  17. The initial shape of the wavelenght of the beam is

    Text Solution

    |

  18. The angle of incident at which reflected light is totally polarised fo...

    Text Solution

    |

  19. According to Huygen's principal light is a front of

    Text Solution

    |

  20. Which one of the following phenomena is not explained by Huygen's cons...

    Text Solution

    |