Home
Class 11
PHYSICS
If the wavelength of incident light on a...

If the wavelength of incident light on a concave mirror is increased, how will the focal length of the mirror change ?

Text Solution

Verified by Experts

The focal length of the mirror does not change on changing the wavelength of light incident on it. This is because `f = R//2`, i.e., `f` depends only one radius of curvature of the mirror.
Promotional Banner

Topper's Solved these Questions

  • RAY OPTICS

    PRADEEP|Exercise Short Answer(a)|14 Videos

  • RAY OPTICS

    PRADEEP|Exercise Long Answer (a)|5 Videos

  • RAY OPTICS

    PRADEEP|Exercise Conceptual Problem(a)|12 Videos

  • PROPERTIES OF BULK MATTER

    PRADEEP|Exercise Multiple choice questions|7 Videos

  • SYSTEMS OF PARTICLES AND ROTATIONAL MOTION

    PRADEEP|Exercise Assertion- Reason Type questions|20 Videos

Similar Questions

Explore conceptually related problems

Focal length of a concave mirror is

If a concave mirror is held in water, then its focal length

A ray of light passing through A retraces its path on reflection from a concave mirror. If PA=30 cm , what is the focal length of the mirror ?

For concave mirror, if the object is within the focal length, its image is

The image (of a real object) formed by a concave mirror is twice the size of the object. The focal length of the mirror is 20cm. The distance of the object from the mirror is:

When the wavelenght of the light used is increased, the focal length of a spherical mirror

The image formed by a concave mirror is twice the size of the object. The focal length of the mirror is 20 cm. The distance of the object from the mirror is//are

The image of a distant object is formed at 30 cm from a concave mirror. What is the focal length of the mirror?

PRADEEP-RAY OPTICS-Very Short (a)
  1. A mirror is turned through 15^(@). Through what angle will the reflect...

    Text Solution

    |

  2. What is the number of images of an object held between two parallel pl...

    Text Solution

    |

  3. Can we obtain the image formed by a convex mirror on a screen ? If not...

    Text Solution

    |

  4. Which of the mirrors is diverging: concave or convex?

    Text Solution

    |

  5. Can a convex mirror form a mgnified image ?

    Text Solution

    |

  6. When does a concave mirror form a virtual image ?

    Text Solution

    |

  7. What is a mirror formula?

    Text Solution

    |

  8. what is the relation between f and R of a spherical mirror ?

    Text Solution

    |

  9. Can a virtual image be photographed by a camera ?

    Text Solution

    |

  10. A person moves with a velocity v towards a plane mirror. With what vel...

    Text Solution

    |

  11. What is the value of focal length of a plane mirror ?

    Text Solution

    |

  12. If the wavelength of incident light on a concave mirror is increased, ...

    Text Solution

    |

  13. To which wavelength of lights is our eye most sensitive ? In which reg...

    Text Solution

    |

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

    Text Solution

    |

  15. How many images of himself can a person see in a room whose ceiling an...

    Text Solution

    |

  16. What are the two types of spherical mirrors ?

    Text Solution

    |

  17. Which spherical mirror has a real focus and which one has a virtual fo...

    Text Solution

    |

  18. Which spherical mirror is converging and which one is diverging ?

    Text Solution

    |

  19. Which spherical mirror forms a virtual, erect and smaller image of an ...

    Text Solution

    |

  20. Where should an object be held so that a concave mirror forms a real, ...

    Text Solution

    |