Home
Class 12
PHYSICS
The intensity of light at a distance r f...

The intensity of light at a distance `r` from the axis of a long cylindrical source is inversely proportional to `r`.

Text Solution

Verified by Experts

KEY CONCEPT: Formula for intensity of a line source of power (P) at a distance r from the source is I=(P)/(2pirl)
Promotional Banner

Topper's Solved these Questions

  • MOVING CHARGES AND MAGNETISM

    SUNIL BATRA (41 YEARS IITJEE PHYSICS)|Exercise MCQs(d )|1 Videos

Similar Questions

Explore conceptually related problems

The mean free path of molecules of a gas (radius r) is inversely proportional to

The value of electric potential at a distance r from a point charge will be (A) proportional to r (B) inversely proportional to r (C) proportional to r^(2) (D) inversely proportional to r^(2)

For a point situated at a distance 20 cm from the axis of a long cyclindrical charged conductor, the electric intensity is 0.4 N//C . The electric intensity at another point situated at 4o cm from the axis is

The intensity of magnetic field due to a short bar magnet at a given point on its axis inversely proportional to_________

Intensity of sound at a point is its distance from the source

Intensity of light at point is directly proportional to

SUNIL BATRA (41 YEARS IITJEE PHYSICS)-RAY AND WAVE OPTICS-JEE Main And Advanced
  1. A ray of light is incident normally on one of the faces of a prism of ...

    Text Solution

    |

  2. The setting sun appears higher in the sky than it really is.

    Text Solution

    |

  3. The intensity of light at a distance r from the axis of a long cylindr...

    Text Solution

    |

  4. A convex lens of focal length 1 meter and a concave lens of focal leng...

    Text Solution

    |

  5. A beam of white light passing through a hollow prism give no spectrum.

    Text Solution

    |

  6. The two slits in Young's double slit experiment are illuminated by two...

    Text Solution

    |

  7. In a Young's double slit experiment performed with a source of white l...

    Text Solution

    |

  8. A parallel beam of white light fall on a combination of a concave and ...

    Text Solution

    |

  9. When a ray of light enters a glass slab form air,

    Text Solution

    |

  10. A glass prism of refractive index 1.5 is immersed in water (refractive...

    Text Solution

    |

  11. In Young's double-slit experiment, the separation between the slits is...

    Text Solution

    |

  12. A ray of light from a denser medium strike a rarer medium at an angle ...

    Text Solution

    |

  13. Two coherent monochromatic light beams of intensities I and 4 I are su...

    Text Solution

    |

  14. Spherical aberration in a thin lens can be reduced by

    Text Solution

    |

  15. A beam of light of wave length 600 nm from a distance source fall on a...

    Text Solution

    |

  16. An isosceles prism of angle 120degree has a refractive index 1.44. Two...

    Text Solution

    |

  17. A diminished image of an object is to be obtained on a screen 1.0 m fr...

    Text Solution

    |

  18. The focal length of the objective and the eye piece of a compound micr...

    Text Solution

    |

  19. Consider Fraunhoffer diffraction pattern obtained with a single slit i...

    Text Solution

    |

  20. In an interference arrangement similar to Young's double-slit experime...

    Text Solution

    |