2. Draw a ray from the top of the object to the lens that is parallel to the principal axis. 4. Draw another ray which passes from the top of the object through the optical centre of the lens.

2. Draw a ray from the top of the object to the lens that is parallel to the principal axis. 4. Draw another ray which passes from the top of the object through the optical centre of the lens.

Lens is one such topic that needs to be given ... When the object is placed between the principal axis and focus Condition 6: When the object is at infinity It is thinner at the center and thicker ...