Description : What are the two sources of refractive index ?
Last Answer : Answer : The formulas are ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, 2) For a pair of light of a certain medium and a certain color , the ratio of the sin ( sin) of the incident angle and the sin ( sin) of the refraction angle is always constant.