Galvani, while dissecting the frog, found in its tissue short-term current pulses, called “animal electricity”. When the scalpel connects the spinal cord and the muscles of the legs, the latter of which contracted.
If the conductor consisted of two metals, then the contraction becomes more noticeable. He explained this phenomenon that nerves and machines represent
electrodes, and the conductor serves as a spark gap.
1 Observation of a (often accidental) physical phenomenon;
2 Attempt to repeat and study (conductor of experiments, research);
3 Putting forward a hypothesis (theoretical laws, postulates);
4 Proof of the hypothesis (theory).
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.