White light is incident on face AB of a glass prism. The path of the green component is shown in the figure. If the green light is just totally internally reflected at face AC as shown, the light emerging from face AB will contain

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Violet, indigo and blue colours

All colours

Yellow, orange and red colours

All colours except green

answer is A.

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Detailed Solution

If the green light is just totally internally reflected at face AC as shown, the light emerging from face AB will contain Yellow, orange and red colours.

The refractive index is highest for Violet and lowest for Red.

Thus, critical angle is lowest for Violet and highest for Red.

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