1. Incident Ray: The ray of light travels parallel to the principal axis and strikes the mirror.
2. Reflection: The ray of light reflects off the mirror.
3. Reflected Ray: The reflected ray passes through the focal point (F) of the mirror.
Why this happens:
* Law of Reflection: The angle of incidence (angle between the incident ray and the normal to the mirror) is equal to the angle of reflection (angle between the reflected ray and the normal).
* Concave Mirror: A concave mirror converges incoming light rays towards its focal point.
In summary: A ray of light approaching a concave mirror parallel to the principal axis will reflect through the focal point of the mirror. This is a key property of concave mirrors and is used in many applications like telescopes and headlights.
