Home
Class 12
PHYSICS
An initially parallel cylindrical beam t...

An initially parallel cylindrical beam travels in a medium of refractive index `mu(l)=mu_(0)+mu_(2)l`, where `mu_(0)` and `mu_(2)` are positive constants and l is the intensity of the light beam. The intensity of the beam is decreasing with increasing radius.
The speed of light in the medium is

A

minimum the axis of the beam

B

the same everywhere in the beam

C

directly proportional to the intensity `I`

D

maximum on the axis of the beam

Text Solution

Verified by Experts

The correct Answer is:
A
`mu=mu_(0)+mu_(2)(I)`

as it is given that intensity of beam is decreasing with increasing radius, and as `I` decreases `mu` also decreases.
Now by `V=(C)/(mu).` Speed of light is minimum at axis of cylinder.
Promotional Banner

Topper's Solved these Questions

  • WAVE OPTICS

    RESONANCE ENGLISH|Exercise Exercise-3 (Part-3)|22 Videos

  • WAVE OPTICS

    RESONANCE ENGLISH|Exercise Advanced Level Problems|8 Videos

  • WAVE OPTICS

    RESONANCE ENGLISH|Exercise Exercise-3 (Part-1)|11 Videos

  • WAVE ON STRING

    RESONANCE ENGLISH|Exercise Exercise- 3 PART II|7 Videos

Similar Questions

Explore conceptually related problems

An intially parallel cyclindrical beam travels in a medium of refractive index mu (I) = mu_(0) + mu_(2) I , where mu_(0) and mu_(2) are positive constants and I is intensity of light beam. The intensity of the beam is decreasing with increasing radius. Answer the following questions : The speed of light in the medium is

An intially parallel cyclindrical beam travels in a medium of refractive index mu (I) = mu_(0) + mu_(2) I , where mu_(0) and mu_(2) are positive constants and I is intensity of light beam. The intensity of the beam is decreasing with increasing radius. Answer the following questions : As the beam enters the medium, it will

An intially parallel cyclindrical beam travels in a medium of refractive index mu (I) = mu_(0) + mu_(2) I , where mu_(0) and mu_(2) are positive constants and I is intensity of light beam. The intensity of the beam is decreasing with increasing radius. Answer the following questions : The initial shape of the wavefront of the beam is

If a convex lens of refractive index mu _l is placed in a medium of refractive index mu_m Such that mu_l > mu_m > mu_(air) then

Refractive index mu is given as mu=A+B/lambda^2, where A and B are constants and lambda is wavelength, then dimensions of B are same as that of

Refractive index mu is given as mu=A+B/lambda^2, where A and B are constants and lambda is wavelength, then dimensions of B are same as that of

If light travels a distance of 5 m in a medium of refractive index mu , then equivalent path in vaccum it would travel in same time is

If epsilon_0 and mu_0 are respectively the electric permittivity and the magnetic permeability of free space and epsilon and mu the corresponding quantities in a medium, the refractive index of the medium is

If c is velocity of light in vacuum and v is the velocity of light in a medium of refractive index mu , then

Refractive index of the material of concave lens is mu . The lens is immersed inb a medium of refractive index mu_(1)(mu_(1)gtmu) . A parallel beam of light is incident on the lens. Draw a diagram to show the path of emergent rays.