Home
Class 12
PHYSICS
A person wants to see AB part of his ima...

A person wants to see AB part of his image. His eye level is at 1.8m above the ground. If he uses minimum size of mirror required for this, find the height of the lowest point of mirror above the ground.

Text Solution

Verified by Experts

The correct Answer is:
`1.4m`
Figure , shows the image of the person and images `A^(')` and `B^(')` of points A and B, respectively. Form the figure,
`h=(1+1.8)/(2)=1.4m`
Promotional Banner

Topper's Solved these Questions

  • GEOMETRICAL OPTICS

    CENGAGE PHYSICS|Exercise Single Correct|221 Videos

  • GEOMETRICAL OPTICS

    CENGAGE PHYSICS|Exercise Assertion-Reasoninig|2 Videos

  • GEOMETRICAL OPTICS

    CENGAGE PHYSICS|Exercise Exercise1.7|21 Videos

  • FRICTION

    CENGAGE PHYSICS|Exercise QUESTION BANK|1 Videos

  • GRAVITATION

    CENGAGE PHYSICS|Exercise Question Bank|39 Videos

Similar Questions

Explore conceptually related problems

A boy of height 1.5m with his eye level at 1.4m stands before a plane mirror of length 0.75 m fixed on the wall. The height of the lower edge of the mirror above the floor is 0.8 m. Then ,

Ramesh places a mirror on level ground to determine the height of a pole (with traffic light fired on it) (see the figure). He stands at a certain distance so that he can see the top of the pole reflected from the mirror. Ramesh's eye level is 1.8 m above the ground. The distance of Ramesh and the pole from the mirror are 1.5 m and 2.5 m respectively. If Ramesh's eye level is 1.2 m above the ground, then the height of the pole is:

Ramesh places a mirror on level ground to determine the height of a pole (with traffic light fired on it). He stands at a certain distance so that he can see the top of the pole reflected from the mirror. Ramesh's eye level is 1.8 m above the ground. The distance of Ramesh and the pole from the mirror are 1.5 m and 2.5 m respectively. If Ramesh's eye level is 1.2 m above the ground, then the height of the pole is:

A person has D cm wide face and his two eyes are separated by d cm. The minimum width of a mirror required for the person to view his complete face is

A man of height 1.6 m wishes to see his full image in a plane mirror. The minimum height of the mirror needed for this purpose is

Find the minimum height of a mirror where one can see his full image.

A body swinging on a swing is 1 metre above the ground at the lowest point. He is 2m above the ground at the highest postiion. What is the velocity at the lowest point of the swing?

Ramesh places a mirror on level ground to determine the height of a pole (with traffic light fired on it). He stands at a certain distance so that he can see the top of the pole reflected from the mirror. Ramesh's eye level is 1.8 m above the ground. The distance of Ramesh and the pole from the mirror are 1.5 m and 2.5 m respectively. If the distance of Ramesh and the pole from the mirror are 2.5 m and 1.5 m respectively, then the height of the pole is:

Ramesh places a mirror on level ground to determine the height of a pole (with traffic light fired on it) (see the figure). He stands at a certain distance so that he can see the top of the pole reflected from the mirror. Ramesh's eye level is 1.8 m above the ground. The distance of Ramesh and the pole from the mirror are 1.5 m and 2.5 m respectively. The height of the pole is:

CENGAGE PHYSICS-GEOMETRICAL OPTICS-Subjective
  1. There is a spherical glass shell of refractive index 1.5, inner radius...

    Text Solution

    |

  2. A direct-vision prism is made out of three prisms, each with a refract...

    Text Solution

    |

  3. A person wants to see AB part of his image. His eye level is at 1.8m a...

    Text Solution

    |

  4. The internal surface of the walls of a sphere is specular. The radius...

    Text Solution

    |

  5. As shown in Figure,. And object O is at the position (-10,2) with resp...

    Text Solution

    |

  6. In figure, AB is the principal axis of the concave mirror. A point ob...

    Text Solution

    |

  7. If an observer sees the bottom of the vessel shown in Figure., at 8cm,...

    Text Solution

    |

  8. O is a point object kept on the principal axis of a concave mirror M o...

    Text Solution

    |

  9. In Figure ., L is a converging lens of focal length 10cm and M Iis a c...

    Text Solution

    |

  10. A stationary observer O looking at a fish F in water (mu(w)=4//3) thro...

    Text Solution

    |

  11. The back wall of an aqaurium is a mirror that is 30 cm away from the f...

    Text Solution

    |

  12. An object is placed 20cm to the left of a converging lens having focal...

    Text Solution

    |

  13. A composite slab consisting of different media is placed in front of a...

    Text Solution

    |

  14. A parallel beam of light falls on the surface of a convex lens whose r...

    Text Solution

    |

  15. A thin biconvex lens of refractive index 3//2 and radius of curvature...

    Text Solution

    |

  16. A convex lens of focal length f(1) is placed in front of a luminous po...

    Text Solution

    |

  17. A lens is made of three thin different mediums. Radius of curvature an...

    Text Solution

    |

  18. An equiconvex lens, f(1)=10cm, is placed 40 cm in front of a concave ...

    Text Solution

    |

  19. A biconvex lens, f(1)=20cm , is placed 5cm in front of a convex mirror...

    Text Solution

    |

  20. A transparent sphere of radius R ahs a cavity of radius R//2 as shown ...

    Text Solution

    |