Starting from the fermat’s principle derive an equation for a shape of an air-glass interface which collimate the rays from a point s0on the optical axis in air parallel to the optical axis in glass (ng=1.5).

The correct answer is c

Wouldnt it be millileter

The  asthenosphere  is now thought to play a critical role in the movement of plates across the face of earth's surface. according to plate tectonic theory, the lithosphere consists of a relatively small number of very large slabs of rocky material.