Home
Class 12
PHYSICS
A real point source is 5cm away from a p...

A real point source is 5cm away from a plane mirror whose reflectinig ability is `50%` , while the eye of an observer (pupil diameter 5mm) is 10cm away form the mirror. Asuume that both source and eye are on the same line perpendicular to the surface and refracted rays have no effect on intensity. Then,

Text Solution

Verified by Experts

`2.2 m^(2)`
Promotional Banner

Topper's Solved these Questions

  • GEOMETRICAL OPTICS : REFLECTION

    RESNICK AND HALLIDAY|Exercise PRACTICE QUESTIONS (single correct choice type)|27 Videos

  • GEOMETRICAL OPTICS : REFLECTION

    RESNICK AND HALLIDAY|Exercise PRACTICE QUESTIONS (more than one correct choice type)|6 Videos

  • GEOMETRICAL OPTICS : REFLECTION

    RESNICK AND HALLIDAY|Exercise CHECKPOINT|5 Videos

  • GAUSS' LAW

    RESNICK AND HALLIDAY|Exercise PRACTICE QUESTIONS (INTEGER TYPE)|3 Videos

  • GEOMETRICAL OPTICS : REFRACTION

    RESNICK AND HALLIDAY|Exercise Practice questions(Integers)|4 Videos

Similar Questions

Explore conceptually related problems

If the object is 5 cm away from the plane mirror , the image formed by it and the object will be ------- cm apart .

A concave mirror forms an image of 20 cm high object on a screen placed 5.0 m away from the mirror. The height of the image is 50 cm. Find the focal length of the mirror and the distance between the mirror and the object.

a sound source emits frequency of 180 h_(Z) when moving towards a rigid wall with speed 5 m//s and an observer is moving away from with speed 5 m//s . Both source and observer moves on a straight line which is perpendicular to the wall. The number of beatd per second heard by the observer will be [speed of sound = 335 m//s ]

A monochromatic point source (S_(1)) is at a distance d from a screen. Another identical source (S_(2)) is at a large distance from the screen. The two sources are on a line which is perpendicular to the screen. Sources are coherent. What is the shape of interference fringes on the screen? (b) Three identical coherent sources are placed on a straight line with two neighbouring ones separated by a distance "d = 0.06 mm" . The sources produce monochromatic light of wavelength lambda" = 550.4 nm" . A line AB is located at a distance D = 2.50 m from the sources and is perpendicular to line joining the three sources. Intensity of light at P with any one of the sources switched on is I_(o) . Find the intensity when all three sources are switched on. Distance of point P from O is "y = 1.72 cm (see figure)"

Object O is placed in front of a plane mirror M. A glass slab S having thickness t = 3 cm and refractive index mu = 1.8 is placed between the object and the mirror. The refracting faces of the slab are parallel to the mirror surface. The object is made to move with a velocity of u = 2 m//s perpendicular to the mirror surface. Find the speed of the image formed after (a) refraction from the slab followed by reflection from the mirror. (b) refraction from the slab followed by reflection from the mirror followed by the refraction from the slab.

Concave mirror forms the real image of a point source lying on the optical axis at a distance of 50 cm from the mirror. The focal length of the mirror is 25 cm. The mirror is cut into and its halves are drawn a distance of 1 cm apart in a direction perpendicular to the optical axis. How will the image formed by the halves of the mirror be arranged?

A concave mirror forms real image of a point source lying on the optical axis at a distance of 50cm from the mirror. The focal length of the mirror is 25cm. The mirror is cut in two, and its halves are drawn at a distance of 1 cm apart in a direction perpendicular to the optical axis. Q. The distance between the two images formed by the two halves of the mirror is

RESNICK AND HALLIDAY-GEOMETRICAL OPTICS : REFLECTION -PROBLEMS
  1. Two plane mirrors are placed parallel to each other and 40 cm apart. A...

    Text Solution

    |

  2. Two plane mirrors are inclined at an angle of 72^(@) . The number of i...

    Text Solution

    |

  3. A fluorescent lamp of length 1m is placed horizontally at a depth of 1...

    Text Solution

    |

  4. A concave mirror forms an image of 20 cm high object on a screen place...

    Text Solution

    |

  5. Two bodies A and B are moveing toward a palne mirror with speed v(A) a...

    Text Solution

    |

  6. A concave shaving mirror has a radius of curvature of 35.0 cm. It is p...

    Text Solution

    |

  7. An object is 30.0 cm from a spherical mirror along the central axis. T...

    Text Solution

    |

  8. The image of a candle flame placed at a distance of 30 cm from a mirro...

    Text Solution

    |

  9. A converging beam of light rays in incident on a concave spherical ...

    Text Solution

    |

  10. An object is placed in front of a concave mirror, a three times magnif...

    Text Solution

    |

  11. A concave shaving mirror has a radius of curvature of 35.0 cm. It is p...

    Text Solution

    |

  12. The sun (diameter d) subtends an angle theta radian at the pole of a c...

    Text Solution

    |

  13. A small piece of wire bent into an L shape, with upright and horizonta...

    Text Solution

    |

  14. Two spherical mirros (convex and concave) having the same focal length...

    Text Solution

    |

  15. A point sources of light is 60cm from a screen and is kept at the focu...

    Text Solution

    |

  16. As object is placed exactly midway between a concave mirror of R = 40 ...

    Text Solution

    |

  17. A police inspector in a jeep is chasing a pickpocket on a straight roa...

    Text Solution

    |

  18. A real point source is 5cm away from a plane mirror whose reflectinig ...

    Text Solution

    |

  19. Two rays are incident on a spherical mirror of radius R = 5 cm paralle...

    Text Solution

    |

  20. A small block of mass m and a concave mirror of radius R fitted with a...

    Text Solution

    |