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 .
More over , on Vernal Equinox , the points beyond ( northwards ) and below ( southwards ) the subsolar point ( on equator ) the shadow of this vertical stick will point towards a direction little westwards of true north ( NNW ) reading 336.5° from true north and little eastward of true south ( SSE ) reading 156.5° from true north severally and on Autumnal Equinox , when Sub solar point is on the Tropic of Cancer 23.5° north of equator shadow will point towards a direction little eastwards of true north ( NNW ) reading 23.5° from true north and little westward of true south ( SSE ) reading 203.5° from true north severally , 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