If a red light ray falls on the following system of prisms then after dispersion how many colours do we see in the emergent ray?

All 7 distinc colours

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Only 1 white coloured ray

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Only 1 red coloured ray

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Except red all the colours

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Solution

The correct option is C
Only 1 red coloured ray

White light is dispersed in seven colours but red would just be refracted and no dispersion will happen at all.

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Similar questions

If white ray falls on the system in the given way then how many colours will we see after all dispersion has happened?

If white ray falls on the system as shown in the given diagram, then how many colours will we see after all dispersions have happened?

Statement 1: When white light ray passes through a prism, it disperses into seven different colours, and this phenomenon is called dispersion.

Statement 2: In a refracting media, lights of different colour travel at different speed.

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