Answer:
recording the wavelength of light
Explanation:
When an appropriate measure of energy say in the form of light of a certain wavelength, is supplied, electrons have a tendency to absorb the energy and get excited to a higher energy level. Conversely, if an electron is already at a higher energy state it will emit energy in the form of light (or heat) and return to a more stable lower energy state.
Things such as magic, astrology, and psychic predictions are not considered science because there is not enough empirical and circumstantial evidence to back up the hypotheses. I hope this helps, and please mark as Brainliest answer!