• question_answer An oil flowing on water seems coloured due to interference. For observing this effect, the approximate thickness of the oil film should be                                  [DPET 1987; JIPMER 1997; RPMT 2002, 04] A) $100\,\,{AA}$B) $10000\,\,{AA}$C) 1 mmD) 1 cm

$10000\,\,{AA}$