Answer :
Final answer:
When a wave's wavelength triples while traveling to a new medium, its speed remains the same, and the frequency stays constant.
Explanation:
When a wave travels from one medium to another, if the wavelength triples, the speed must stay the same while the frequency remains constant. This is because the speed of a wave is determined by the properties of the medium it travels in, and the frequency of the wave remains unchanged despite the change in wavelength.
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