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the scientific method helps us learn about 1. by 2.. Science is 3.___, meaning that is not certain or fixed. Science also cannot explain everything -- for example, science cannot 4.___ or 5.___ ​

Amichelson interferometer operating at a 600 nm wavelength has a 3.02-cm-long glass cell in one arm. to begin, the air is pumped out of the cell and mirror m2 is adjusted to produce a bright spot at the center of the interference pattern. then a valve is opened and air is slowly admitted into the cell. the index of refraction of air at 1.00 atm pressure is 1.00028.how many bright-dark-bright fringe shifts are observed as the cell fills with air?