The Department of Science, Technology and Environment in association with Pondicherry Science Forum will be organising a massive outreach programme to popularise the Zero Shadow Day on Tuesday. The programme will be held in 20 centres across the city between 11.00 a.m. and 12.30 p.m.
Arun Nagalingam, secretary, Pondicherry Science Forum, said when the a place’s lattitude equals the sun’s declination, its rays are perpendicular and exactly at noon the sun is right overhead and shadow of an object falls right below it.
Since Puducherry is inclined at the same angle with respect to the equator, the sun’s rays fall exactly perpendicular at noon at around 12.16 p.m., he said.
