Home
Class 12
PHYSICS
If x(1) is the size of the magnified ima...

If `x_(1)` is the size of the magnified image and `x_(2)` is the size of the diminsghed image in lens displacement method, then the size of the object is

A

`sqrt(x_(1)x_(2))`

B

`x_(1)x_(2)`

C

`x_(1)^(2)x_(2)`

D

`x_(1)x_(2)^(2)`

Text Solution

Verified by Experts

The correct Answer is:
A
(a) The size of the object in accordance with the Fresnel's displacement law is given by `sqrt(x_(1)x_(2)`
Promotional Banner

Topper's Solved these Questions

  • RAY OPTICS

    DC PANDEY ENGLISH|Exercise medical entrance special format question|23 Videos

  • RAY OPTICS

    DC PANDEY ENGLISH|Exercise Medical entrance gallary|76 Videos

  • RAY OPTICS

    DC PANDEY ENGLISH|Exercise Checkpoint 9.7|10 Videos

  • NUCLEI

    DC PANDEY ENGLISH|Exercise C MADICAL ENTRANCES GALLERY|46 Videos

  • REFLECTION OF LIGHT

    DC PANDEY ENGLISH|Exercise Subjective|9 Videos

Similar Questions

Explore conceptually related problems

If x_(1) is the size of the magnified image and x_(2) is the size of the diminished image in lens displacement method, then the size of the object is

If I_(1) and I_(2) be the size of the images respectively for the two positions of lens in the displacement method, then the size of the object is given by

When the distance between the object and the screen is more than 4 f . We can obtain image of the object on the screen for the two positions of the lens. If is called displacement method. In one case, the image is magnified and in the other case, it is diminished. If I_(1) and I_(2) be the sized of the two images, then the size of the object is

A plane mirror is used to obtain an image of an object. Compare the size of the image formed in it to the size of the object.

Find the size of the image formed in the situation shown in figure.

An object of size 2cm is placed at a distance of 40cm from a glass lens, close to the principal axis of the lens, and the lens forms an image of size 2cm . What is the size of the image and what type of image is formed if the lens and the object, in the same arrangement, is immersed into water ? The refractive index of the lens 1.5 , and that of the water is 1.33 .

A concave mirror has a radius of curvature of 24 cm. How far is an object from the mirror if an image is formed that is: (a) virtual and 3.0 times the size of the object, (b) real and 3.0 times the size of the object and (c) real and 1//3 the size of the object?.

A student focuses the image of a well illuminated distant object on a screen using a convex lens. After that the gradually moves the object towards the lens and each time focuses its image on the screen by adjucting the lens. (a) In which direction -towards the screen or away from the screen, does he move the lens ? (b)What happens to the size of the image-does it decrease or increase ? (c) What happens to the image on the screen when he moves the object very close to the lens ?

What determines the size of a pinhole camera image?

An object is placed 12cm in front of a lens to form an image on a screen. The size of the image is twice that of the object. What is the distance between the object and the image?

DC PANDEY ENGLISH-RAY OPTICS-Exercise
  1. Object is placed 15 cm from a concave mirror of focal length 10 cm, th...

    Text Solution

    |

  2. When a lens of refractive index n(1), then the lens looks to be dissap...

    Text Solution

    |

  3. If x(1) is the size of the magnified image and x(2) is the size of the...

    Text Solution

    |

  4. Mark the correct one.

    Text Solution

    |

  5. The direction of ray of light incident on a concave mirror is shown by...

    Text Solution

    |

  6. Two beam of red and violet color are made to pass separately through a...

    Text Solution

    |

  7. When sun light is scatterred by minute particles of atmosphere, then t...

    Text Solution

    |

  8. An object is placed at a distance u from an equiconvex lens such that ...

    Text Solution

    |

  9. If the aperature of a telescope is decreased resolving power will

    Text Solution

    |

  10. A telescope has an objective of focal length 100 cm and an eye-piece o...

    Text Solution

    |

  11. Which one of the following is not associated with the total internal r...

    Text Solution

    |

  12. The time required for the light to pass through a glass slab ( refract...

    Text Solution

    |

  13. Electromagnetic radiation of frequency v, velocity v and wavelength la...

    Text Solution

    |

  14. We combined a convex lens of focal length f(1) and concave lens of foc...

    Text Solution

    |

  15. The wavelength of light is 589 nm. What is its wavelength in Å ?

    Text Solution

    |

  16. Light travels in two media A and B with speeds 1.8 xx 10^(8) ms^(-1) a...

    Text Solution

    |

  17. The focal length of a thin convex lens for red and blue colours is 100...

    Text Solution

    |

  18. Two mirrors are placed at right angle to each other. A man is standing...

    Text Solution

    |

  19. To get three images of a single object, One should have two plane mirr...

    Text Solution

    |

  20. If two mirrors are keps at 60^circ to each other, then the number of i...

    Text Solution

    |