From a point source, the wavefronts are expanding spheres.

(click on picture)
Examples --- What this is an example of

---

The light rays are perpendicular to these expanding spherical wavefronts.

(click on picture)
Examples --- What this is an example of

---

The ray approximation describes the light from a point source by rays pointing outward in all directions.

(click on picture)
Examples --- What this is an example of

---