Answers

2015-01-01T23:27:33+05:30

This Is a Certified Answer

×
Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
The refracting index of  water = 1.33.  Perhaps with other particles and chemicals mixed in water, it may be a little higher or lower.

The critical angle for water to air interface is : Sin⁻¹ 1/1.33 = 48.6 deg.  When Sun rays from distant Sun in the morning or late in the afternoon, fall on water drops with angle of incidence around 40 deg. Then they get refracted at 28 deg, nearly. Then they fall on the other spherical surface of the drop at the other end, the angle of incidence gets more than 48.6 degrees.   Hence, they get totally internally reflected.  A little dispersion occurs already at the first refraction.

After the total internal reflection, the colors disperse a lot when refracting a second time.

2 3 2
click on thank you and select best answer