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## Main Question or Discussion Point

I had a doubt regarding the propagation of de Broglie waves.

How do we know the speed of propagation of these waves and also do there characteristics( speed and amplitude and frequency) depend on the source particle ( or they depend only on the motion(momentum) of the source and no whatsoever relation with the "type" of particle)?

How do we know the speed of propagation of these waves and also do there characteristics( speed and amplitude and frequency) depend on the source particle ( or they depend only on the motion(momentum) of the source and no whatsoever relation with the "type" of particle)?