A theory in science is a vast combination of truths and well-tested hypotheses. Theories are a foundation of science and are not fixed but evolve. The test of knowledge is an experiment in science. In experiment, the researchers come to a conclusion by manipulating some aspect of nature of observation.
A theory can be proved wrong by a series of experiments, whose results are inconsistent with the theory.
On the other hand, a theory can never be regarded correct just by executing a few experiments, because every theory has some constraints like - the environment, instruments and procedure employed in performing the experiments. As these factors change, the experimental results may change and they may not always be consistent with the predictions of the theory. Hence, there is no precise number of experiments which can prove a theory correct.
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