In the figure given below, a narrow beam of white light is shown to pa

1.	In the figure given below, a narrow beam of white light is shown to pass through a triangular glass prism. After passing through the prism, it produces a spectrum XY on the screen.(i) Name the phenomenon. (ii) State the colours seen at X and Y. (iii)Why do different colours of white light bend at different angles through a prism?
Answer» (i) The phenomenon is called dispersion. (ii) X — Violet Y — Red (iii) Different colours of white light bend through different angles with respect to the incident beam of light due to difference in speed of light of different wavelengths.

In the figure given below, a narrow beam of white light is shown to pass through a triangular glass prism. After passing through the prism, it produces a spectrum XY on the screen.(i) Name the phenomenon. (ii) State the colours seen at X and Y. (iii)Why do different colours of white light bend at different angles through a prism?

Answer»

(i) The phenomenon is called dispersion.

(ii) X — Violet Y — Red

(iii) Different colours of white light bend through different angles with respect to the incident beam of light due to difference in speed of light of different wavelengths.

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