In total reflection when the angle of incidence is equal to the critical angle then angle of refraction is?

Question

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Answer 1

At $i = i_{c}$ , refracted ray grazes with the surface.
So angle of refraction is $9 0^{o}$ .

Answer 2

At

i = i_{c}

, refracted ray grazes with the surface.
So angle of refraction is

9 0^{o}

.

In total reflection when the angle of incidence is equal to the critical angle then angle of refraction is?

$18 0^{o}$

$0^{o}$

Equal to angle of incidence

$9 0^{o}$

At $i = i_{c}$ , refracted ray grazes with the surface.
So angle of refraction is $9 0^{o}$ .

Why the angle of incidence must not be less then $3 0^{o}$ while calculating angle of minimum deviation?

In the figure shown, the light beam strikes the surface $2$ at the critical angle. Determine the angle of incidence $(i_{1})$ .

A total reflection right angled isosceles prism can be used to deviate a ray of light through:

If the critical angle for total internal reflection from a medium to vacuum is $3 0^{o}$ . Then velocity of light in the medium is:

Critical angle of light passing from glass to air is minimum for violet colour.

The wavelength of violet light is greater than the light of other colours.

Revise with Concepts

Refraction Through Prism

Deviation Produced by a Triangular Prism

Relation Between Angle of Prism and Angle of Deviation, Refractive Index of Materials

Minimum Deviation in a Triangular Prism

Deviation in Reflection, Refraction and Prism

Problems on Tir in Prism

In total reflection when the angle of incidence is equal to the critical angle then angle of refraction is?

180o

0o

Equal to angle of incidence

90o

At i=ic​, refracted ray grazes with the surface. So angle of refraction is 90o.

Why the angle of incidence must not be less then 30o while calculating angle of minimum deviation?

In the figure shown, the light beam strikes the surface 2 at the critical angle. Determine the angle of incidence (i1​).

A total reflection right angled isosceles prism can be used to deviate a ray of light through:

If the critical angle for total internal reflection from a medium to vacuum is 30o. Then velocity of light in the medium is:

Critical angle of light passing from glass to air is minimum for violet colour.

The wavelength of violet light is greater than the light of other colours.

Revise with Concepts

Refraction Through Prism

Deviation Produced by a Triangular Prism

Relation Between Angle of Prism and Angle of Deviation, Refractive Index of Materials

Minimum Deviation in a Triangular Prism

Deviation in Reflection, Refraction and Prism

Problems on Tir in Prism

$18 0^{o}$

$0^{o}$

$9 0^{o}$

At $i = i_{c}$ , refracted ray grazes with the surface.
So angle of refraction is $9 0^{o}$ .

Why the angle of incidence must not be less then $3 0^{o}$ while calculating angle of minimum deviation?

In the figure shown, the light beam strikes the surface $2$ at the critical angle. Determine the angle of incidence $(i_{1})$ .

If the critical angle for total internal reflection from a medium to vacuum is $3 0^{o}$ . Then velocity of light in the medium is: