(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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Class 12 Questions

Class 12

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Ray Optics and Optical Instruments

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Critical Angle and Total Internal Reflection

What should be the maximum acceptance angle at the air-core interface of an optical fibre if $n_1$ and $n_2$ are the refractive indices of the core and the cladding respectively?

Difficult

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$A$ light ray traveling in a glass medium is incident on a glass-air interface at an angle of incidence $\theta$. The reflected $(R)$ and transmitted $(T)$ intensities,both as functions of $\theta$,are plotted. The correct sketch is:

DifficultIIT 2011

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The critical angle for a medium is $60^o$. The refractive index of the medium is:

Easy

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Explain the principle,construction,and working of an optical fibre.

Medium

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$A$ ray of light is incident at an angle $i$ from a denser to a rarer medium. The reflected and the refracted rays are mutually perpendicular. The angle of reflection is $r$ and the angle of refraction is $r'$. Then the critical angle $C$ will be:

MediumIIT 1983

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

Similar Questions

What should be the maximum acceptance angle at the air-core interface of an optical fibre if $n_1$ and $n_2$ are the refractive indices of the core and the cladding respectively?

$A$ light ray traveling in a glass medium is incident on a glass-air interface at an angle of incidence $\theta$. The reflected $(R)$ and transmitted $(T)$ intensities,both as functions of $\theta$,are plotted. The correct sketch is:

The critical angle for a medium is $60^o$. The refractive index of the medium is:

Explain the principle,construction,and working of an optical fibre.

$A$ ray of light is incident at an angle $i$ from a denser to a rarer medium. The reflected and the refracted rays are mutually perpendicular. The angle of reflection is $r$ and the angle of refraction is $r'$. Then the critical angle $C$ will be:

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