2. Which rules apply to concave mirror ray tracing? Click all that apply. If an incident ray travels through the focal point on the way to the curved mirror, the ray will be reflected back parallel to the principal axis. If an incident ray travels toward the focal point on the way to the curved mirror, the ray will be reflected back parallel to the principal axis. If an incident ray travels parallel to the principal axis on the way to the curved mirror, the ray will be reflected in away from the focal point behind the mirror. If an incident ray travels parallel to the principal axis on the way to the curved mirror, the ray will be reflected back through the focal point