What is the shape of wavefront from distant source of light?
A perpendicular drawn to the wavefront in the direction of propagation of light is
A ray of light travelling in air incident on a rectangular glass block and emerges out into the air from the opposite face. Draw a labelled ray diagram to show the complete path of this ray of light. Mark the two points where the refractions of light takes place. What can you say about the final direction of ray of light?
How is a wavefront related to the direction of corresponding rays ?
What is meant by refraction of light ? State the laws of refraction. Show that emergent ray from a glass slab is parallel to incident ray.
