Patrick Mahomes is trying to break the longest touchdown record. He wants to use the very best ball to compete. Mahomes experiment in practice using a leather ball, rubber ball, and foam football to see which one will go the farthest

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?