(C) The critical angle $i_{c}$ is defined as the angle of incidence in a denser medium (glass) for which the angle of refraction in the rarer medium (

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The angle of incidence for which the refracted ray travels along the glass-air boundary

(C) The critical angle $i_{c}$ is defined as the angle of incidence in a denser medium (glass) for which the angle of refraction in the rarer medium (air) is $90^{\circ}$.At this specific angle of incidence,the refracted ray grazes the interface between the two media,effectively traveling along the glass-air boundary.

Class 12 Physics Ray Optics and Optical Instruments Critical Angle and Total Internal Reflection

Easy

When a ray of light emerges from a block of glass,the critical angle is

A
Equal to the angle of reflection
B
The angle between the refracted ray and the normal
C
The angle of incidence for which the refracted ray travels along the glass-air boundary
D
The angle of incidence

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Ray Optics and Optical Instruments

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Critical Angle and Total Internal Reflection

Light enters an isosceles right triangular prism at normal incidence through face $AB$ and undergoes total internal reflection at face $BC$ as shown below. The minimum value of the refractive index of the prism is close to

MediumKVPY 2011

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$A$ light ray is incident perpendicularly to one face of a $90^{\circ}$ prism and is totally internally reflected at the glass-air interface. If the angle of incidence at the interface is $45^{\circ}$,we conclude that the refractive index $n$ is:

MediumAIIMS 2014

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$A$ light wave enters from medium $1$ to medium $2$. Its velocity in the $2^{nd}$ medium is double that in the $1^{st}$ medium. For total internal reflection,the angle of incidence must be greater than.......$^o$.

MediumAIIMS 2016

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Light travels in two media $A$ and $B$ with speeds $1.8 \times 10^8 \ m/s$ and $2.4 \times 10^8 \ m/s$ respectively. Then the critical angle between them is

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$A$ wide container is filled with water $\left(\mu=\frac{4}{3}\right)$ up to a height of $1 \ m$. Find the diameter of the disc at the top of the water surface from which light is coming out.

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When a ray of light emerges from a block of glass,the critical angle is

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Light enters an isosceles right triangular prism at normal incidence through face $AB$ and undergoes total internal reflection at face $BC$ as shown below. The minimum value of the refractive index of the prism is close to

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