Estimate the volume of each ball. Use the formula V = 4πr3/3 where V is the volume and r is the radius. Record the volumes in Table A of your Student Guide. What is the estimated volume of the table tennis ball? cm3 What is the estimated volume of the golf ball? cm3

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?