What influences the duration of the day and night as one moves from north to south

Sun rays walls directly onto areas that are on the equator, whilst they get more slanted nearer the poles. so if you can imagine it the sun rays at 90° or perpendicular to the earth at the equator, due to the curvature in the earth, they 'tilt' in a way when you get nearer to North/ south poles. Therefore it is the Latitudinal Extent (how far one goes towards a pole/ away from the equator) that influences the chance of different durations of day and night.