A light ray moving in medium - I (of refractive index $n_{1}$ ) is incident on interface of two media and it is totally internally reflected at the interface. Now, refractive index $n_{2}$ of medium - II is decreased, then:

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Answer 1

As $n_{2}$ decreases, $i_{C} = sin^{- 1} (\frac{n _{2}}{n _{1}})$ also decreases.
So, condition $i > i_{c}$ is still satisfied and there will be still total internal reflection at interface. If angle of incidence is increases, then ray will be still totally internally reflected at interface because $i > i_{C}$ .

Answer 2

As

n_{2}

decreases,

i_{C} = sin^{- 1} (\frac{n _{2}}{n _{1}})

also decreases.
So, condition

i > i_{c}

is still satisfied and there will be still total internal reflection at interface. If angle of incidence is increases, then ray will be still totally internally reflected at interface because

i > i_{C}

.

A light ray moving in medium - I (of refractive index $n_{1}$ ) is incident on interface of two media and it is totally internally reflected at the interface. Now, refractive index $n_{2}$ of medium - II is decreased, then:

ray will move completely parallel to the interface

ray will be still totally internally reflected at interface

ray will be totally transmitted into medium-II only if angle of incidence is increased

ray will be totally transmitted in medium-II

The minimum refractive index of the prism given

below should be:

AB and CD are two slabs. The medium between the slabs has refractive index 2. Find the minimum angle of incidence at Q so that the ray is totally reflected by both the slabs

A ray of light travelling in a transparent medium of refractive index falls on a surface separating the medium from the air at an angle of incidence of 45. For which of the following values of the ray can undergo total internal reflection?

White light is incident on the interface of glass and air as shown in the figure. If green light is just totally internally reflected then the emerging ray in air contains :

For the given incident ray as shown in figure, the condition of total internal reflection of this ray the minimum refractive index of prism will be :

A light ray moving in medium - I (of refractive index n1​) is incident on interface of two media and it is totally internally reflected at the interface. Now, refractive index n2​ of medium - II is decreased, then:

ray will move completely parallel to the interface

ray will be still totally internally reflected at interface

ray will be totally transmitted into medium-II only if angle of incidence is increased

ray will be totally transmitted in medium-II

As n2​ decreases, iC​=sin−1(n1​n2​​) also decreases. So, condition i>ic​ is still satisfied and there will be still total internal reflection at interface. If angle of incidence is increases, then ray will be still totally internally reflected at interface because i>iC​.

The minimum refractive index of the prism givenbelow should be:

AB and CD are two slabs. The medium between the slabs has refractive index 2. Find the minimum angle of incidence at Q so that the ray is totally reflected by both the slabs

A ray of light travelling in a transparent medium of refractive index falls on a surface separating the medium from the air at an angle of incidence of 45. For which of the following values of the ray can undergo total internal reflection?

White light is incident on the interface of glass and air as shown in the figure. If green light is just totally internally reflected then the emerging ray in air contains :

For the given incident ray as shown in figure, the condition of total internal reflection of this ray the minimum refractive index of prism will be :

A light ray moving in medium - I (of refractive index $n_{1}$ ) is incident on interface of two media and it is totally internally reflected at the interface. Now, refractive index $n_{2}$ of medium - II is decreased, then:

The minimum refractive index of the prism given

below should be: