|MadSci Network: Physics|
Hi there, Your question hits deep into the strange world of relativity and quantum mechanics. I will try to answer as simple as possible: 1. In a general sense, neither wavelength nor frequency are fixed. The only invariable is stationary mass, which is connected to frequency and wavelength through the following equation: 2 4 2 2 2 2 m c / 4 pi = c / l - f where c is the velocity of light in the medium the wave is travelling in, l the wavelength, m the stationary mass and f the frequency. However, if the medium with respect to the observer is travelling at non-relativistic speed (as in our everyday world), the frequency is constant. 2. Waves AND paricles are only vehicles of understanding and are different concepts only in our limited brain. In quantum mechanics they are the same: particles ARE waves and waves ARE particles.
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