Repeat the experiment several times, holding your finger at several different distances from your face. Does the size of the parallax shift increase or decrease when your finger is held farther from your face

Most of the volume of an atom is occupied by the

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?

Is the number of complete movements of a wave per second.