Home
Class 12
PHYSICS
A sphere (mu=4/3) of radius 1 m has a sm...

A sphere `(mu=4/3)` of radius `1 m` has a small cavity of diameter `1 cm` at its centre. An observer who is looking at it from tight, sees the magnification of diameter of the cavity as

A

`4/3`

B

`3/4`

C

`1`

D

`0.5`

Text Solution

Verified by Experts

The correct Answer is:
A
Cavity of placed at centre. Hence, image of cavity
is also formed at centre, as all rays fall normal to
surface at all point. (so pass undedicated).

Now, `m=((mu_1)/(mu_2))(v/u)`
`=((4//3))/1 ((1m)/(1m))`
`=4/3`
Promotional Banner

Topper's Solved these Questions

  • REFRACTION OF LIGHT

    DC PANDEY|Exercise Single Correct Option|3 Videos

  • REFRACTION OF LIGHT

    DC PANDEY|Exercise more than one correct option|1 Videos

  • REFRACTION OF LIGHT

    DC PANDEY|Exercise Subjective Questions|8 Videos

  • REFLECTION OF LIGHT

    DC PANDEY|Exercise Subjective|9 Videos

  • SEMICONDUCTORS

    DC PANDEY|Exercise Subjective|12 Videos

Similar Questions

Explore conceptually related problems

A metallic sphere of diameter D has a cavity of diameter d at its centre. If the sphere is heated, the diameter of the cavity will:

A glass sphere of radius 5 cm has a small bubble at a distance 2 cm from its centre. The bubble is viewed along a Diameter of the sphere from the side on which it lies.How far from the surface will it appear.Refractive index of glass is 1.5 2.5 cm behind the surface

A glass sphere of radius 15 cm has a small bubble 6 cm from its centre. The bubble is viewed along a diameter of the sphere from the side on which it lies. How for from the surface will it appear to be if the refractive index of glass is 1.5 ?

A glass sphere ( mu =1.5) of radius 20 cm has small air bubble 4 cm below its centre. The sphere is viewed from outside and along vertical line through the bubble. The apparent depth of the bubble below the surface of sphere is (in cm)

A uniform solid sphere of radius R has a cavity of radius 1m cut from it if centre of mass of the system lies at the periphery of the cavity then

A conducting sphere of radius R_(2) has a spherical cavity of radius R_(1) which is non concentric with the sphere. A point charge q_(1) is placed at a distance r from the centre of the cavity. For this arrangement, answer the following questions. If q_(1) is shifted to the centre of the cavity, then: (choose the correct alternative)

A conducting sphere of radius R_(2) has a spherical cavity of radius R_(1) which is non concentric with the sphere. A point charge q_(1) is placed at a distance r from the centre of the cavity. For this arrangement, answer the following questions. Electric potential at the centre of the cavity will be :

A conducting sphere of radius R_(2) has a spherical cavity of radius R_(1) which is non concentric with the sphere. A point charge q_(1) is placed at a distance r from the centre of the cavity. For this arrangement, answer the following questions. Electric field (magnitude only) at the center of the cavity will be :

A particle of mass m is placed at a distance of 4R from the centre of a huge uniform sphere of mass M and radius R . A spherical cavity of diameter R is made in the sphere as shown in the figure. If the gravitational interaction potential energy of the system of mass m and the remaining sphere after making the cavity is (lambdaGMm)/(28R) . Find the value of lambda

A sphere of radius 2R and mas M has a spherical cavity of radius R as shown in the figure. Find the value of gravitational field at a point P at a distance of 6R from centre of the sphere.

DC PANDEY-REFRACTION OF LIGHT-Level 2 Single Correct
  1. The maximum value of refractive index of a prism which permits the tra...

    Text Solution

    |

  2. A glass slab of thickness 4 cm contains the same number of waves as 5 ...

    Text Solution

    |

  3. If the optic axis of convex and concave lenses are separated by a dist...

    Text Solution

    |

  4. A light source S is placed at the centre of a glass sphere of radius R...

    Text Solution

    |

  5. A sphere (mu=4/3) of radius 1 m has a small cavity of diameter 1 cm at...

    Text Solution

    |

  6. An equi-convex lens of mu=1.5 and R=20 cm is cut into two equal parts ...

    Text Solution

    |

  7. As shown in the figure, region BCDEF and ABFG are of refractive index ...

    Text Solution

    |

  8. A point object O is placed at a distance of 20 cm from a convex lens o...

    Text Solution

    |

  9. A point object is placed at a distance of 20 cm from a thin plano-con...

    Text Solution

    |

  10. A flat glass slab of thickness 6 cm and index 1.5 is placed in front o...

    Text Solution

    |

  11. Distance of an object from the first focus of an equi-convex lens is 1...

    Text Solution

    |

  12. A cubical block of glass of refractive index n1 is in contact with the...

    Text Solution

    |

  13. A concave mirror of focal length 2 cm is placed on a glass slab as sho...

    Text Solution

    |

  14. Two refracting media are separated by a spherical interfaces as shown ...

    Text Solution

    |

  15. A concavo-convex lens has refractive index 1.5 and the radii of curvat...

    Text Solution

    |

  16. A convex spherical refracting surfaces separates two media glass and ...

    Text Solution

    |

  17. An object is moving towards a converging lens on its axis. The image i...

    Text Solution

    |

  18. Two diverging lenses are kept as shown in figure. The final image form...

    Text Solution

    |

  19. In the figure shown , a point object O is placed in air on the princip...

    Text Solution

    |

  20. In the figure, a point object O is placed in air. A spherical boundry ...

    Text Solution

    |