Answer to Question #24798 in Optics for Alisha Shah

Question #24798

Hi!
My textbook says that dispersion of light takes place in prism due to differing speed and wavelength(hence frequency). But white light(a mixture of 7 colors) travels at 3* 10^8 m/s. Then how come speed changes inside prism? Also if the deviation of a particular colored light is inversely proportional to wavelength and directly proportional to frequency then how come they travel at different speeds? Please help me... I am totally confused!

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