gkangelexa
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When light waves travel from one medium (air) to the next (water), their velocity changes. Does their frequency change also? Or does the wavelength change?
How Does Light Behave When It Travels Between Different Mediums?
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hi gkangelexa! 
the frequency stays the same
the frequency stays the same
(otherwise they wouldn't "join up" properly at the interface 
)
)
Dotini
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Doesn't white light, upon entering a prism, break into colors according to frequency?
Respectfully,
Steve
Respectfully,
Steve
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Hi Steve!
Yup, but the colours are already there (as good ol' Sir Isaac showed) …
Yup, but the colours are already there (as good ol' Sir Isaac showed
) …the colours stay the same, but their speeds change, so they go through at different angles, and become separated.