i'm getting confused. so when white light diffracts, red light will bend the most and blue light will bend the least. but when white light disperses, blue light will bend the most, but white light will bend the least? i'm not understanding why. and also i read somewhere that the angle of diffraction depends on the wavelength, and i want to know how that works out? and doesnt' dispersion depend on snells' law, which shouldn't change for different frequencies because it's just n and sin? thanks, it's not a specific homework question, i just got confused while working some other stuff out. (kay i think i got the diffraction one) asin(theta) = m*wavelength, thus longer wavelength = longer the angle of diffraction. so what's up with the dispersion one now? some tutorial website said frequency would change n, but if n = c/v, why would red light or blue light move faster/slower than one another in a medium?