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Question
In the figure given alongside, a narrow beam of white light is shown to pass through a triangular glass prism. After passing through the prism, it produces a stectrum YX on the screen.
(a) State the colour seen (i ) at X, and (ii) at Y.
(b) Why do different colours of white light bend through different angles with respect to the incident beam of light ?
In the figure given alongside, a narrow beam of white light is shown to pass through a triangular glass prism. After passing through the prism, it produces a stectrum YX on the screen.
(a) State the colour seen (i ) at X, and (ii) at Y.
(b) Why do different colours of white light bend through different angles with respect to the incident beam of light ?
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Solution
(a) (i) violet (ii) Red
(b) Different colours of white light bend through different angles because different colours travel through different speeds through in the glass prism.
(b) Different colours of white light bend through different angles because different colours travel through different speeds through in the glass prism.
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