Why can a matter wave not be represented by a pure sinusoidal wave?

In ECG, what does T wave represent?

What do you mean by matter wave?

Statement I: A moving particle is represented by a progressive wave group. Statement II: Pure sinusoidal wave cannot represent the instantaneous velocity or position of a moving particle.

An incident wave and a reflected wave are represented by xi _(1) = a "sin" (2pi)/(lambda) (vt - x) and xi _(2) = a "sin"(2pi)/(lambda) (vt + x) Derive the equation of the stationary wave and calcu-late the position of the nodes and antinodes.

Is matter wave an electromagnetic wave?

Which wave can not be polarised—

In ECG what is represented by P-wave , QRS complex and T-wave respectively ?

The equation of a wave is represented by y = 10^-4 sin (100t-x/10) , the velocity of the wave will be