Home
Class 12
PHYSICS
A : When tiny circular obstacle is place...

A : When tiny circular obstacle is placed in the path of light from some distance, a bright spot is seen at the centre of the shadow of the obastacle.
R : Destructive interference occurs at the centre of the shadow of circular obstacle.

A

Both A and R are true and R is the correct explanation of A

B

Both A and R are true and R is not the correct explanation of A

C

A is true and R is false

D

Both A and R are false

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • WAVES OPTICS

    AAKASH SERIES|Exercise EXERCISE -II (INTERFERENCE)|26 Videos

  • WAVES OPTICS

    AAKASH SERIES|Exercise EXERCISE -II (DIFFRACTION)|17 Videos

  • WAVES OPTICS

    AAKASH SERIES|Exercise EXERCISE -IA (ASCENDING AND DSCENDING ORDER TYPE QUESTIONS)|6 Videos

  • WAVES

    AAKASH SERIES|Exercise EXERCISE-III (Doppler effect :)|15 Videos

Similar Questions

Explore conceptually related problems

A: When a tiny circular obstacle is placed in the path of light from a distant source, a bright spot is seen at the centre of the shadow of the obstacle. R: Waves diffracted from the edge of the circular obstacle interfere constructively at the centre of the shadow producing a bright spot.

In a singleslit diffraction experiment, when a tiny circular obstacle is placed in the path of light from a distant source, a bright spot is seen at the centre of the shadow of the obstacle. Explain why ? State two points of difference the interference pattern obtained in Young's double slit experiment and the diffraction pattern due to a single slit.

(a) Define a wavefront. Using Huygen's principle, verify the laws of reflection at a plane surface . (b) In a single slit diffraction experiment the wildth of the slit is made double the orignal width. How does this affect the size and intensity of the central diffraction band ? Explain. (c) When a tiny circular obstacle in placed in the path of light from a distance source, a bright spot is seen at the centre of the obstacle . Explain why.

On a particle moving on a circular path with constant speed v , light is thrown from a projectors placed at the centre of the circular path. The shadow of the particle is formed on the wall. The velocity of shadow up the wall is

From a circular disc of radius R , a triangular portion is cut (sec figure). The distance of the centre of mass of the remainder from the centre of the disc is -

A circular coil of radius 2R is carrying current 'i' . The ratio of magnetic fields at the centre of the coil and at a point at a distance 6R from the centre of the coil on the axis of the coil is

Interference fringes were produced using light in a doulbe-slit experiment. When a mica sheet of uniform thickness and refractive index 1.6 (relative to air) is placed in the path of light from one of the slits, the central fringe moves through some distance. This distance is equal to the width of 30 interference bands if light of wavelength 4800 is used. The thickness (in mu m ) of mica is

A circular current carrying coil has a radius R. The distance from the centre of the coil on the axis where the magnetic induction will be (1)/(8) th to its value at the centre of the coil, is

A circular current carrying coil has a radius R. The distance from the centre of the coil on the axis where the magnetic induction will be (1//8)^(th) of its value at the centre of the coil is,

A point charge of 5C is placed at point P (as shown in figure). A unit positive charge is taken from A to B along the circular path shown, then the net work done by electrostatic force is : [O is the centre of the circular path] [Where k=9xx10^9 Nm^2//C^2 ]

AAKASH SERIES-WAVES OPTICS-EXERCISE -IB (ASSERTION AND REASON)
  1. A : Resolving power of a microscope can be increased by choosing a med...

    Text Solution

    |

  2. A : Spy satilight cameras use lenses with very large aperatures. R :...

    Text Solution

    |

  3. A : Transverse wave nature of light is proved by polarisation. R : A...

    Text Solution

    |

  4. A : Nicol prism is used to produce and analyse plane polarised light. ...

    Text Solution

    |

  5. A : When an unpolarised light is incident on a glass plate at Brewster...

    Text Solution

    |

  6. A : The unpolarised light and polarised light can be distinguished fro...

    Text Solution

    |

  7. A : Light coming from numbers of calculator.s L.C.D display is polaris...

    Text Solution

    |

  8. A : One of the images in double refraction doesn't obey the principles...

    Text Solution

    |

  9. Assertion (A): Skiers uses air glasses. Reason(R) : Light reflecte...

    Text Solution

    |

  10. A : 3-D movies are produced by pojecting two images onto a screen, wit...

    Text Solution

    |

  11. Assertion:- Newton's rings are formed in the reflected system. When th...

    Text Solution

    |

  12. A : In a movie ordinary 24 frames are projected per second from one en...

    Text Solution

    |

  13. A : A famous painting was painted by not using brush strokes in the us...

    Text Solution

    |

  14. Assetion To observe diffraction of light the size of obstacle/aperture...

    Text Solution

    |

  15. Assertion (A) : The film which appears bright in reflected system will...

    Text Solution

    |

  16. Statement-1 : On viewing the clear blue portion of the sky through a C...

    Text Solution

    |

  17. A : Diffraction determines the limitations of the concept of light ray...

    Text Solution

    |

  18. A : When tiny circular obstacle is placed in the path of light from so...

    Text Solution

    |

  19. A : At the first glance, the top surf Morpho butterfly.s wing appears ...

    Text Solution

    |

  20. Assertion : Standard optical diffraction gratings cannot be used for ...

    Text Solution

    |