Home
Class 11
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

True. This is because
`E = (I)/(A) = (I)/(2 pi r xx l)` :. `E prop (1)/(r )`.
Promotional Banner

Topper's Solved these Questions

  • RAY OPTICS

    PRADEEP|Exercise Short Answer(d)|17 Videos

  • RAY OPTICS

    PRADEEP|Exercise (NCERT)Short Answer|6 Videos

  • RAY OPTICS

    PRADEEP|Exercise Short Answer(b)|27 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

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