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Refraction - different frequencies

MC REN

If you change the frequency then the speed is less so it will travel slower through the prism right?

if it hits the prism at the same angle as that of a higher frequency ray will the path change?

if the speed actually changes won't this make the refractive index change?

and will the critical angle change?

yes, both will

guessed as much, need to try and calcualte the new angles then (don't think i can, maybe it wants a sketch)

would the critical angle increase or decrease?

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