Home
Class 12
PHYSICS
A small plane mirror placed at the centr...

A small plane mirror placed at the centre of a spherical screen of radius R. A beam of light is falling on the mirror, If the mirror makes `n` revolution per second, the speed of light on the screen after reflection from the mirror will be

A

`4pinR`

B

`2pinR`

C

`(nR)/(2pi)`

D

`(nR)/(4pi)`

Text Solution

Verified by Experts

The correct Answer is:
A
If mirror is turned by `theta`, reflected ray turned by `2theta`
`omega=2pin,2omega=4pin`
`v=R.2omega=4pinR`
Promotional Banner

Topper's Solved these Questions

  • REFLECTION OF LIGHT

    CP SINGH|Exercise EXERCISES|67 Videos

  • PHOTOELECTRIC EFFECT

    CP SINGH|Exercise EXERCISES|73 Videos

  • REFRACTION AT SPHERICAL SURFACES

    CP SINGH|Exercise EXERCISES|105 Videos

Similar Questions

Explore conceptually related problems

A small plane mirror kept at the centre of a sphere of diameter 3 m, makes 12 revolution per second. A thin light beam is made incident on the mirror. The linear speed of the light spot on the sphere, formed after reflection-from the mirror is:

A ray of light is incident on a convex mirror as shown in Fig. Redraw the above diagram after completing the path of the light ray after reflection from the mirror.

A ray of light falling normally on a plane mirror retraces its path on reflection.

A mirror is placed at the centre of a sphere and it is rotating with an angular speed omega . Incident light falls on the mirror at the centre of the sphere. Find out the linear speed of the light spot on the sphere?

A mirror is placed at the centre of a sphere and it is rotating with an angular speed omega . Incident light falls on the mirror at the centre of the sphere. Find out the linear speed of the light spot on the sphere?

Two plane mirrors are placed perpendicular to each other. A ray strikes one mirror and after reflection falls on the second mirror. The ray after reflection from the second mirror will be

A plane mirror reflects a pencil of light to form a real image. Then the pencil of light incident on the mirror is

A point source of light is placed in front of a plane mirror as shown in Figure. Determine the length of reflected path of light on the screen Sigma

Reflection Of Light|Spherical Mirrors

CP SINGH-REFLECTION OF LIGHT-EXERCISES
  1. A room (cubical) is made of mirros. An insect is moving along the diag...

    Text Solution

    |

  2. If an object moves towards a plane mirror with a speed v at an angle t...

    Text Solution

    |

  3. A small plane mirror placed at the centre of a spherical screen of rad...

    Text Solution

    |

  4. A ray of light is incident on the plane mirror at rest the mirror star...

    Text Solution

    |

  5. A point source of light B is placed at a distance L in front of the ce...

    Text Solution

    |

  6. Two plane mirrors A and B are aligned parallel to each other, as shown...

    Text Solution

    |

  7. All the following statements are correct except (for real objects)

    Text Solution

    |

  8. Mark the correct Option:

    Text Solution

    |

  9. In image formatiion from spherical mirrors, only paraxial rays are con...

    Text Solution

    |

  10. Which of the following (referred to a sphericla mirror) do (does) not ...

    Text Solution

    |

  11. Check the wrong statement (s), if object is real (i) A concave mirro...

    Text Solution

    |

  12. A convex mirror is used to form an image of a real object. The image ...

    Text Solution

    |

  13. A concave mirror of focal length f in vacuum is placed in a medium of ...

    Text Solution

    |

  14. A concave mirror of focal length f produces a real image n times the s...

    Text Solution

    |

  15. An object 1cm tall is placed 4cm in front of a mirrorr. In order to pr...

    Text Solution

    |

  16. A spherical mirror forms an erect image three times the size of the ob...

    Text Solution

    |

  17. A concave mirror forms the image of an object on a screen. If the lowe...

    Text Solution

    |

  18. An object is placed at 20 cm from a convex mirror of focal length 20 c...

    Text Solution

    |

  19. An obejct is placed at a distance 2f from the pole of a convex mirror ...

    Text Solution

    |

  20. An object is placed in from of a convex mirror of focal length 50 cm, ...

    Text Solution

    |