Physics - Geometrical Optics Question with Solution | TestHub

According to the rules of refraction for spherical lenses, a ray of light parallel to the principal axis of a concave lens diverges after refraction.

When this refracted ray is extended backwards, it appears to diverge from the principal focus located on the same side of the lens as the object.

By standard convention, the principal focus on the object side (left side) is termed the first principal focus ($F_1$).

Thus, the ray appears to diverge from the first principal focus.

Answer: appears to diverge from the first principal focus.