COSMIC  TRAP :

IN   day - to -day  Human  Life  the  idea  of  DARKNESS  or  'Absence  of  LIGHT'  is  a  VISUAL   TRAP.
VISUAL  LIGHT  of  EMF    is a very   slender  , hair - line-  Band  of  vast  EMF  field  in relative  sense .
And  Night  or  Darkness does not  mean  Absence  of  light .
The Universe  is  always  lighted  up  if  we  had  X-Ray , Gamma  Ray(etc) or  Infra - Red-  eyes.

Like  'Sun- Rising '  is  an  illusive  trap ,  the   sense  of  Darkness or  absence  of  light , even  at  night,  is  a  cosmic  illusion.

Perhaps ,  Shankaracharya( The 9th. Century  A.D [?] Spiritual  Giant of  Bharat) , the  Father  of  COSMIC-ILLUSION ("MAYA  VAAD"), declaring  the  Universe a  Mirage-Play, was  the  'earliest  First  Scientist'   like  Einstein, I think  .
Both  needed  Meditative  Contemplation .
 While EINSTEIN  needed just  pen &  paper  Shankaracharya  needed    not  even  that  !