the sun during the year

What's the angle if incidence in ... at ... o'clock?
Next applet shows the earth. The yellow meridian circle separates the parts that are lightned up by the sun from those that aren't. [br][list][*]You can modify the [b]axial tilt[/b] by dragging the north pole. [/*][*]You can modify the [b]latitude[/b] by dragging the green point on its meridian.[/*][*]You can modify the [b]time[/b] by dragging the blue point on the equator.[/*][*]The yellow arrow marks the [b]angle of incidence[/b] of the sun.[br][/*][/list]

Information: the sun during the year