According to wave nature of matter, there is a wave associated with every material body. Mention any two differences between light wave and matter wave

According to wave nature of matter, there is a wave associated with every material body. What is the wavelength of electron when it is accelerated by a voltage of 54V.

What is the main difference between electromagnetic waves theory and Planck's quantum theory?

A body of mass 1 Kg is moving with a velocity 1 m/s, a wave is associated with this body : Can you measure wave length of this wave. Explain?