Why Rainbow is in the form of an arc?

Why is a rainbow always bent in the shape of a semi circle…?? but according to the theory light travels straight….!!! (Ramesh asked)

Principle of Homogenity of Dimensions

Binay Sharma asked: "Explain the applications of the Principle of homogenity of Dimensions and its importance" Principle of homogenity of dimensions states that "For an equation to be dimansionally correct, the dimensions of each term on LHS must be equal to the dimensions of each term on RHS." Applications 1. To determine the dimensions of … Continue reading Principle of Homogenity of Dimensions