Question

Zeta potentianame method of refining based on principle of afsorption

Answer 1

In physics, the observer effect is the theory that the mere observation of a phenomenon inevitably changes that phenomenon[1]. This is often the result of instruments that, by necessity, alter the state of what they measure in some manner. A common example is checking the pressure in an automobile tire; this is difficult to do without letting out some of the air, thus changing the pressure