What happens to the speed and wavelength of a wave when it enters a denser medium?

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Question

What happens to the speed and wavelength of a wave when it enters a denser medium?

Accepted Answer

Speed decreases, wavelength decreases, frequency stays the same — When a wave enters a denser medium, it slows down and its wavelength decreases. Frequency always stays the same.

Answer

Speed increases, wavelength increases

Answer

Speed decreases, wavelength decreases, frequency stays the same

Answer

Everything stays the same

Answer

Both increase

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