What function accurately represents the sine curve for red light?
f(x) = sin pi over 640x
f(x) = sin 640_x
f(x) = sin 320_x
f(x) = sin pi over 320x
f(x) = sin pi over 640x
f(x) = sin 640_x
f(x) = sin 320_x
f(x) = sin pi over 320x
