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Write the conditions for total internal reflection.

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State the conditions of total internal reflection. Refractive indices of the given prism material for Red, Blue and Green colours are respectively 1.39, 1.48 and 1.42 respectively. Trace the path of rays through the prism.

State the conditions of total internal reflection. Refractive indices of the given prism material for Red, Blue and Green colors are respectively 1.39, 1.48 and 1.42 respectively. Trace the path of rays through the prism.

Knowledge Check

  • For a given incident ray as shown in Fig., the condition of total internal reflection of ray will be satisfied if the refractive index of the block will be. .

    A
    `(sqrt(3) + 1)/(2)`
    B
    `(sqrt(2) + 1)/(2)`
    C
    `sqrt((3)/(2))`
    D
    `sqrt((7)/(6))`

  • If the critical angle for total internal reflection from a medium to vaccum is 30^(@) , the speed of light in the mediu is

    A
    `3xx10^(8)ms^(-1)`
    B
    `1.5xx10^(8)ms^(-1)`
    C
    `sqrt3xx10^(8)ms^(-1)`
    D
    `2xx10^(8)ms^(-1)`

  • Which is true for total internal reflection?

    A
    Light travels from rarer to denser medium
    B
    Light travels from denser to rarer medium
    C
    Independent of the optical densities of two medium
    D
    Takes place in the same medium

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    What is total internalreflection ? What is the meaning of critical angle ? What are the necessary conditions for total internal reflection ? Write the relation between critical angle and refractive index of the medium.

    Describe briefly any three applications of total internal reflection.

    What is critical angle? Give one application of total internal reflection.

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