Question

the ray which passes away from the principal axis.........​

Answer 1

Answer:

When the parallel rays of light pass through a concave lens to the principal axis, it deviates from its focal point and refracts the light rays. Due to this reason, it is called the Concave or Diverging lens. An incident light ray parallel to the principal axis of a concave lens, passes through it and diverges.

Answer 2

Answer:

concave lens are the principle axis