Tomorrow
24th of April as every year Bangalore will witness Zero
Shadow Day. Sun as we all know appears to move in north and south
directions which we call uttarayana and dhakshinayana. At present Sun
is in northern motion and will reach the northern most point of 23.5
degrees on June 21st .
During this motion, tomorrow Sun
will be exactly overhead at local noon in Bangalore. To find out when
Sun will be exactly overhead on your location just check the
declination of Sun, if Declination of Sun and latitude of your
location is same then on that day Sun will be exactly overhead at
local noon.
To observe the Zero Shadow Day you need a vertical
reference like a pole which is straight and perpendicular to the
ground, this can be pencil, a small nail, a water bottle etc,. Since
we are all in lock down, we can spend few minutes observing this
phenomenon. Setup your experiment well before 12 noon and start
observing from 12 noon to 12:30 and you will see the shadow move from
one side of the reference to other side and with no shadow at
12:17pm.
Hope skies will be clear and you all will enjoy this
activity with full family.
