Home
Class 12
PHYSICS
A ray of light is incident on a thin fil...

A ray of light is incident on a thin film, As shown in figure, M and N two reflected rays while P and Q are two transmitted rays. Rays N and Q undergo a phase change of `pi`. Correct ordering of the refracting indices is

A

`n_(2)gtn_(3)gtn_(1)`

B

`n_(3)gtn_(2)gtn_(1)`

C

`n_(3)gtn_(1)gtn_(2)`

D

none of these the specified changes can not occur

Text Solution

Verified by Experts

The correct Answer is:
B
There is a phase change of x when the ray enters from rarer medium into denser medium, the boundary is called rigid boundary and also no change in phase when it enters into rarer medium.
Promotional Banner

Topper's Solved these Questions

  • WAVE OPTICS

    ALLEN|Exercise Exercise 2 (Brain Teasures)|22 Videos

  • WAVE OPTICS

    ALLEN|Exercise Exercise 3 (Miscellaneous type Questions)|27 Videos

  • WAVE OPTICS

    ALLEN|Exercise Example 15|1 Videos

  • UNIT & DIMENSIONS, BASIC MATHS AND VECTOR

    ALLEN|Exercise Exercise (J-A)|7 Videos

Similar Questions

Explore conceptually related problems

A ray of light is incident in situation as shown in figure. Which of the following statements is//are true?

A ray of light is incident on a transparent medium at polarizing angle. What is the angle between the reflected ray and the refracted ray .

A ray of light-is incident on glass at the polarising angle ip. Find the angle between the reflected and refracted rays.

A light ray is incident on a glass slab, it is partially reflected and partially transmitted. Then the reflected ray is

A ray of light is incident on a transparent glass slab of refractive index sqrt3 . If the reflected and refracted rays are mutually perpendicular, what is the angle of incidence?

A ray of light AO is incident on a diverging lens as shown in figure. The focal plane of the lens is also given. The possible direction of the refracted ray will be

Unpolarized light is incident on a plane glass surface. The angle of incidence so that reflected and refracted rays and perpendicular to each other, then

A ray of light is incident at an angle i from denser to rare medium. The reflected and the refracted rays are mutually perpendicular. The angle of reflection and the angle of refraction are respectively r and r'. Then the critical angle will be:

A ray of monochromatic light is incident from air on a glass slab. Name the two rays that are parallel to each other.

A ray of light enters a spherical drop of water of refractive index mu as shown in figure. Q. Select the correct statement:

ALLEN-WAVE OPTICS-Exercise 1 (Check your Grasp)
  1. In YDSE if a slab whose refractive index can be varied is placed in fr...

    Text Solution

    |

  2. In a double-slit experiment, instead of taking slits of equal width, o...

    Text Solution

    |

  3. A ray of light is incident on a thin film, As shown in figure, M and N...

    Text Solution

    |

  4. Let S(1) and S(2) be the two slits in Young's double-slit experiment. ...

    Text Solution

    |

  5. When light is refracted into a medium

    Text Solution

    |

  6. Two point source separated by d=5mum emit light of wavelength lamda=2m...

    Text Solution

    |

  7. Two coherent narrow slits emitting light of wavelength lambda in the s...

    Text Solution

    |

  8. When a Transparent sheet of refractive index mu=3/2 is placed near on...

    Text Solution

    |

  9. In the YDSE shown the two slits are covered with thin sheets having th...

    Text Solution

    |

  10. In a YDSE with two identical slits, when the upper slit is covered wit...

    Text Solution

    |

  11. Light wavelength 650 nm is incident normally upon a glass plate the gl...

    Text Solution

    |

  12. Diffraction and interference of light suggest

    Text Solution

    |

  13. The phenomenon of diffraction of light was discovered by-

    Text Solution

    |

  14. Sound waves shown more diffraction as compare to light rays-

    Text Solution

    |

  15. The conversation going on, in some room, can be heared by the person o...

    Text Solution

    |

  16. Diffraction initiated from obstacle, depends upon the

    Text Solution

    |

  17. Phenomenon of diffraction occurs

    Text Solution

    |

  18. Diffraction of light is observed only, when the obstacle size is-

    Text Solution

    |

  19. Which of the following any gives more distinct diffraction

    Text Solution

    |

  20. All fringes of diffraction are of-

    Text Solution

    |