A stick will cast a shadow towards the north , reading 336.5° from true north and little eastward of true south ( SSE ) reading 156.5° , during Vernal Equinox due to the sun 's path .
On the Tropic of Cancer 23.5° north of equator , the same stick will cast no shadow on June 21 , the summer solstice in the northern hemisphere , although on points beyond ( northwards ) 23.5° north the shadow will point towards true north and points below ( southwards ) 23.5° north the shadow will point towards true south .
Sun path