Home
Class 12
PHYSICS
Refractive index of a medium is mu. Its ...

Refractive index of a medium is `mu`. Its thickness is t. Velocity of light in vacuum is e. In what time does light travel through the medium? 

A

`c//mu t`

B

`mu//c t`

C

`mt// c`

D

`c t//mu`

Text Solution

Verified by Experts

The correct Answer is:
A
`""_(a)mu_(m) = (v_(a))/(v_(m)) rArr mu = (c)/(v_(m)) " "therefore` Velocity of light in medium `v_(m) = (c )/(mu)`
Thickness = Distance = t `therefore` Time `= ("Distance")/("Velocity") = (t)/(c//mu) = (mu t)/(c) therefore` Time = `(mu t)/(c)`
Doubtnut Promotions Banner Mobile Dark
|

Similar Questions

Explore conceptually related problems

Refractive index of a medium is mu . Its thickness is t. Velocity of light in vacuum is c. In what time does light travel through the medium?

Refractive index of a thin soap flm of a uniform thickness is 1.34. Find the smallest thickness of the film that gives an interference maximum in the reflected light when light of wavelength 5360 Å falls at normal incidence.

Knowledge Check

  • The refractive index of water is 1.33. What will be the speed of light in water?

    A
    `3xx10 ^8 ms^(-1)`
    B
    `2.26xx10^8 ms^(-1)`
    C
    `4xx0^8ms^(-1)`
    D
    `1.33xx10^8 ms^(-1)`

  • Assertion : Denser the medium, higher is its refrective index and slower is the velocity of light. Reason : Refractive index is proportional to the velocity of light in the medium.

    A
    If both assertion and reason are true and reason is the correct explanation of assertion .
    B
    If both assertion and reason are true but reason is not the correct explanation of assertion .
    C
    If assertion is true but reason is false.
    D
    If both assertion and reason are false.

  • Absolute refractive index of a medium, of permittivity epsilon and permeability mu , is given by

    A
    `sqrt ((mu_(o) epsilon_(o))/ (mu epsilon))`
    B
    `sqrt ((mu epsilon )/ (mu_(o) epsilon_(o)))`
    C
    `1/sqrt (epsilon/epsilon_(o))`
    D
    `sqrt epsilon`

    • Similar Questions

    Explore conceptually related problems

    Refractive index of a thin soap film of a uniform thickness is 1.34. Find the smallest thickness of the film that gives an interference maximum in the reflected light when light of wavelength 5360 Å falls at normal incidence.

    Find the speed of light in medium 'a' if speed of light in medium 'b' is c/3 where c=speed of light in vacuum and light refracts from medium 'a' to medium 'b' making 45° and 60° respectively with the normal.

    F in the speed of light in medium 'a' if speed of light in medium 'b' is (c )/(3) where c = speed of light in vacuum and light refracts from medium 'a' to medium 'b' making 45^(@) and 60^(@) respectively with the normal.

    A student when discussing the properties of a medium (except vacuum) writes Velocity of light in vacuum=Velocity of light in medium The formula is

    Light of wavelength 6400 dotA is incident normally on a plane parallel glass slab of thickness 5 cm and refractive index 1.6. The beam takes the same time to travel from the source to the incident surface as it takes to travel through the slab. Then:

    Home
    Profile