"A wave travels from one medium to another, and the wavelength decreases. What happens to the velocity and the frequency?"

Question

I know that frequency will remain the same, because it is controlled only by the source. But does the velocity decrease? According to Snell's law, velocity should decrease as wavelength decreases...although it doesn't make sense to me to say that wavelength would get shorter as velocity decreases.

Answer 1

YEs, if wavelength is smaller, velocity is smaller.

velocity= lambda*frequency.