Select the correct answer Object A attracts object B with a gravitatlonal force of 10 newtons from a glven distance. Ifthe distance between the two objects Is doubled,
what Is the new force of attractlon between them?
OA 2.5 newtons
OB.5 newtons
OC. 20 newtons
OD. 100 newtons

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?