True.
The wavelength is often measured from the top of the first wave to the top of the second wave. But it can be measure from the bottom of one to the bottom of the second as well.
FALSE
true
relatively short wavelengths compared to higher pitched notes
false
False the light year is not a unit of time it is a unit of distance true.
That's the wavelength. Isn't it?
no
True.
It is False.
true
true
True