Home
Class 12
PHYSICS
For the same angle of incidence, the ang...

For the same angle of incidence, the angles of refraction in three different media A, B and C are`15^(@), 25^(@)` and `35^(@)` respectively. In which medium, will the velocity of light be minimum ?

Text Solution

Verified by Experts

Refractive index, `mu = (sini)/(sinr)`.
For the same value of `i , mu propto (1)/(sir)`
In the given problem,
`r_(1) lt r_(2) lt r_(3) or, sinr_(1) lt sinr_(2) lt sinr_(3)`
`therefore " " mu_(1) gt mu_(2) gt mu_(3)`
`"As velocity of light", v = (c)/(mu), i.e.,v propto (1)/(mu), "we have" " " v_(1) lt v_(2) lt v_(3)`
So in the first medium, the velocity of light minimum.
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • REFRACTION OF LIGHT

    CHHAYA PUBLICATION|Exercise NEET|3 Videos

  • REFLECTION OF LIGHT

    CHHAYA PUBLICATION|Exercise INTEGER ANSWER TYPE|3 Videos

  • SEMICONDUCTORS AND ELECTRONICS

    CHHAYA PUBLICATION|Exercise CBSE SCANNER|31 Videos

Similar Questions

Explore conceptually related problems

For same angle of incidence the angles of refraction for three different media A, B and C are 15^(@) , 25^(@) and 35^(@) respectively. In which medium the velocity of light is minimum?

For the same angle of incidence, the angle of refraction in two media A and B are 25^(@) and 35^(@) respectively. In which medium is the speed of light less?

Knowledge Check

  • Statement I : The velocity of light rays of different colours is the same. But the velocity of the light rays are different for any other medium. If v = velocity of light in the respective medium c = velocity of light in vacuum, mu = refractive index, then v = ( c )/(mu) . Statement II : mu is different for different media.

    A
    Statement I is true, statement II is true, statement II is a correct explanation for statement I.
    B
    Statement I is true, statement II is true, statement II is not a correct explanation for statement I.
    C
    Statement I is true, statement II is false.
    D
    Statement I is false, statement II is true. '

  • The angle of incidence for a ray of light at a refracting surface of a prism is 45^(@) . The angle of prism is 60^(@) . If the ray surface minimum deviation through the prism, the angle of minimum deviation and refractive index of the material of the prism respectively, are:

    A
    `30^(@)` ,` sqrt(2)`
    B
    `45^(@)` , `sqrt(2)`
    C
    `30^(@)` , `(1)/(sqrt(2))`
    D
    `45^(@)` , `(1)/(sqrt(2))`

    • Similar Questions

    Explore conceptually related problems

    Value of absolute refractive index of medium A,B,C and D are 1.5,1.4,2.5 and 1.3. In which medium velocity of light is higher-

    Between the angle of incidence and the angle of refraction which one is greater when light travels from a rarer to a denser medium?

    If angle of incidence and angle of refraction be 45^@ and 30^@ respectively. What is refractive index of water is

    A right angled prism is immersed in water. When a ray of light is incident normally on a side adjacent to the right angle, the ray is totally reflected from the face opposite to the right angle and emerges through the other adjacent side of the right angle. But if the ray is incident normally on the face opposite to the right angle and no internal reflection takes place. If the other two angles of the prism are 60^(@) and 30^(@) respectively what is the range of the value of the refractive index of the material of the prism? Refractive index of water in vacuum = 1.33

    If a beam of red light and a beam of violet light are incident at the same angle on the inclined surface of a prism from air medium and produce angles of refraction r and nu respectively, which of the following is correct?

    A ray of light is refracted from medium 1 to medium 2. Show that the ratio of the sine of the angle of incidence and the sine of the angle of refraction is equal to the ratio of velocity of light in medium 1 and that in medium 2.

    Home
    Profile