Aslit of width a is illuminated by plane waves of light at two wavelengths λ1 & λ2, such that λ1 = 2xλ2. diffraction occurs, giving a pattern of maxima and minima. sketch the intensity distribution of this pattern. in one experiment, the value of a = 0.05 mm. the screen where the pattern is located is at a distance of 2m from the slit. calculate the positions of the first minima for both λ1 and λ2, from the central axis linking the slit to the screen, in the case where λ2 = 300 nm.