Home
Class 12
PHYSICS
An object is kept at a distance of 60 cm...

An object is kept at a distance of 60 cm from a concave mirror. For getting a magnification of `(1)/(2)`, Focal length of the concave mirror required is

A

a. 20 cm

B

b. 40 cm

C

c. `-20` cm

D

d. 30 cm

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • RAY OPTICS AND OPTICAL INSTRUMENTS

    NEW JOYTHI PUBLICATION|Exercise PREVIOUS YEAR QUESTIONS|2 Videos

  • NUCLEI

    NEW JOYTHI PUBLICATION|Exercise COMPETITIVE EXAM CORNER|23 Videos

  • SEMICONDUCTOR ELECTRONICS : MATERIALS , DEVICES AND SIMPLE CIRCUITS

    NEW JOYTHI PUBLICATION|Exercise COMPETITIVE EXAM CORNER|37 Videos

Similar Questions

Explore conceptually related problems

An object at a distance of 30 cm from a concave mirror gets its image at the same point. The focal length of the mirror is

An object of length 2.5 cm is placed at a distance of 1.5 f from a concave mirror where f is the magnitude of the focal length of the mirror. The length of the object is perpendicular to the principal axis. Find the length of the image. Is the image erect to inverted?

An object is placed 40 cm from a concave mirror of focal length 20 cm, the image formed is

A point object is placed at a distance of 30cm from a convex mirror of focal length 30cm. The image will from at

If an object is placed at 10 cm infront of a concave mirror of focal length 15 cm. The magnification of image is

An object is placed at a distance of 20.0 cm from a concave mirror of focal length 15.0 cm. (a) What distance from the mirror a screen should be placed to get a sharp image? (b) What is the nature of the image?

An object 2.5 cm high is placed at a distance of 10 cm from a concave mirror of radius of curvature 30 cm. The size of the image is

If an object is placed at the focus of a concave mirror, where is the. image formed?

An object is placed at a distance of 15 cm from a convex lens. If the focal length of the lens is 60 cm, find the image distance.

NEW JOYTHI PUBLICATION-RAY OPTICS AND OPTICAL INSTRUMENTS -COMPETITIVE EXAM CORNER
  1. For an angle of incidence theta on an equilateral prism of refractive ...

    Text Solution

    |

  2. The power of a biconvex lens is 10 dioptre and the radius of corvature...

    Text Solution

    |

  3. The focal length of the lens of refractive index (mu = 1.5) in air is ...

    Text Solution

    |

  4. A glass prism of refractive index 1.5 is immersed in water (mu = (4)/(...

    Text Solution

    |

  5. A ray of light is incident at 60^(@) on one face of a prism of angle 3...

    Text Solution

    |

  6. An object is kept at a distance of 60 cm from a concave mirror. For ge...

    Text Solution

    |

  7. If the speed of light in material A is 1.25 times its speed in materia...

    Text Solution

    |

  8. The resolving power of a microscope is

    Text Solution

    |

  9. The least distance of distance vision of a person is 75 cm. The focal ...

    Text Solution

    |

  10. The focal lengths of the objective and the eyepiece of the telescope a...

    Text Solution

    |

  11. The angle of incidence for an equilateral prism of refractive index sq...

    Text Solution

    |

  12. The sunlight reaches us as white light and not as its compounts becaus...

    Text Solution

    |

  13. The apparent flattening of the sun at sunset and sunrise is due to

    Text Solution

    |

  14. Identify the mismatch in the following

    Text Solution

    |

  15. Two lenses of power 15 and - 3 dioptre are placed in contact. The foca...

    Text Solution

    |

  16. The speed of light in an isotropic medium depends on

    Text Solution

    |

  17. Astigmatism is corrected using

    Text Solution

    |

  18. An aperture of size a is illuninated by a parallel beam of light of wa...

    Text Solution

    |

  19. Identify the wrong sign convention

    Text Solution

    |

  20. A ray of light is incident normally on one refracting surface of an eq...

    Text Solution

    |