In talking about interference, particularly with light, you will most likely speak in terms of phase differences, as well as wavelength differences. in the mathematical description of a sine wave, the phase corresponds to the argument of the sine function. for example, in the function y=asin(kx), the value of kx at a particular point is the phase of the wave at that point. recall that in radians a full cycle (or a full circle) corresponds to 2π radians. how many radians would the shift of half a wavelength from the previous part correspond to? express your answer in terms of π.